Here are the four most common symptoms of a bad ECM computer: The Check Engine Light is on. Check the shift solenoids that attach to the valve body, sometimes they can go bad. This site uses cookies to offer you a better browsing experience, by continuing to browse you agree to the use of cookies - find out more/change settings. Brand New Air Flow Meter Suit Nissan 300zx Z32 80mm AFM MAF 22680-30P00. What are the symptoms of a bad ECU? At some point during the month of August the Roadfly forums are going to become archive only. A glance through this article will enlighten you enough about them, to identify their failure if it ever occurs. Coz at concept Z did my ECU socket/program. 6i Club 5dr Auto (1998 - 2004 Model) Automatic 1598cc, which does not seem to match up to the e-map links in the earlier posts. Some of the more common symptoms of a worn-out or broken engine exhaust valve are rough idling, backfiring, reduced power and decreased gas mileage. I dont your question of "symptoms of or how to diagnose a TCM" is worth answering because it probably isn't your issue. Drove a mostly highway tank yesterday and got 16. 5 Symptoms of a Bad ABS Control Module (and Replacement Cost) Last Updated October 17, 2019 by Kevin The anti-lock braking system control module, also known as the ABS control module, works to prevent your wheels from locking up as you’re driving. Anywhere from immediately to 15 minutes later the bike INSTANTLY starts running like crap. Learn how to tell if you have a faulty ECU. at that time I couldnt really think straight. Re: Symptoms of Bad Temperature Sensor (JIMBO ROBERTS) 12-22-2005 10:38 PM #2 The only real way to determine whether your coolant temperature sensor is faulty is to use a diagnostic tool like VAG-COM to see what temperature the sensor is reporting to the ECU when the coolant is fully warm. what does that do? Pls. In fact some people call it the brain box. Below is a helpful guide to determine if you have a faulty ECU. On OBDII cars, the OBDII system will not only identify misfires but also coil and injector problems. Low power & lean running or rich running (excess smoke or overheating) are also fair game. Motor is newly rebuilt, all new plugs, known good PTU, CAS, Coilpacks. Alex Childers 3,722 views. I also checked the timing to see if it was off or to see if it was jerking back and forth to see if timing belt was bad. Chassis: Z32 300zx. A cold engine should read 2-4 volts, a fully warmed engine 0-2 volts. 83 sr5 convertible rusted camo-rattlecan paintjob. However, he seemed not too sure about what he was telling me. Second I would deal with the manifold runner. TexasNissans. i sold a 2000 ecu on ebay for $60 2 years ago, i bought it on ebay for only $35. Check your Fuses for blown fuses. USED Ford Mustang Engine Computer, Mustang ECU, Mustang CCRM Display: Grid List. its bone stock. Engine Tech Forum > 6-Cylinder Tech > 3. Let's take a look at how to clear that pesky "check engine" light, so you don't panic when driving down the highway. 2 Motronic DME unit back to its original operating condition with a repairable unit. The Engine Control Unit (ECU) is a small computer which monitors all engine sensors and controls all engine functions for fuel delivery, ignition timing, rev limiter, speed limiter, valve timing control and emission systems. BASIC UPGRADES FOR THE 81-83 280ZX-T, and 84-89 300ZX-T Stock 280ZX -T HP = 180 @ ~ 6 - 7 PSI Stock 300ZX -T HP = 200 @ ~ 6 – 7 PSI Add JWT upgraded ECU can run about 11 PSI = ~ 225 HP $595. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. valve as described previously. In other words, there are other intermittent problems which are caused by plugged fuel filters, bad grounds, bad O2 sensors, ECU problems, ECU power supply problems etc. What I don't know is if my OBD1 ecu is bad or if the conversion harness is bad. Car was jump started on reverse polarity. Below are the top 5 symptoms of a bad engine control unit in a vehicle. You may stone me to death if this has been worded differently and already covered. If you get a chance to mess with nistune, you'll also notice it shows no throttle position on Z31 ECUs, but it will on Z32s. Re: 109 Relay Symptoms? Cheapest way to diagnose is to simply replace the relay; it's a $20 part. Used Datsun 280Z & 280ZX Electronic Control Units. Check the shift solenoids that attach to the valve body, sometimes they can go bad. Best Answer: The ECU or "Electronic Control Unit" is a small computer that runs the car's fuel, ignition and emission systems. BASIC UPGRADES FOR THE 81-83 280ZX-T, and 84-89 300ZX-T Stock 280ZX -T HP = 180 @ ~ 6 - 7 PSI Stock 300ZX -T HP = 200 @ ~ 6 – 7 PSI Add JWT upgraded ECU can run about 11 PSI = ~ 225 HP $595. If the check engine light comes on before you start the engine, the engine starts and the check engine light goes out, the ECU is almost certainly okay. Torque management, boost levels, nitrous control, ignition correction and other functions can now be accessed and controlled via a cabin-mounted switch panel. External sensors like the throttle position sensor, vehicle speed sensor inhibitor switch quite often go bad, causing these symptoms. Nissan 300ZX Rough Idle Repair Symptoms Ignition Coil Replacement A failing ignition coil can create several symptoms: Check engine light comes on Engine runs poorly or stall Increased emissions Reduced fuel economy Car won't start I. – Nissan Titan Forum of a photo I get directly from the Nissan Frontier Fog Light Relay Wiring Diagram package. Bad ECU Symptoms. If it idles as usual and the ECU warning light stays off go drive for a few minutes to see if everything's ok. Some medicines can also cause low sodium in your blood. I have a bad ECU and they claim it looks like someone had tried to pry it open so my extended warranty is not going to cover it. No expensive scanners, dealer trips or complicated, diagnostic tools will be required. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Also, take apart the connectors on the PTU and clean off the connectors. 00) (Must use a boost controller to go higher than 6 - 7 PSI). Find car prices, photos, and more. The key factor with EFI?, is the ECU doing the bad fueling? ,due to bad inputs? or are the outputs bad? (injector) Bad injectors or Injector drive is bad. Symptoms of a Bad or Failing Exhaust Gas Recirculation (EGR) Valve Common signs include engine performance issues like decreased power and acceleration, rough idle, and the Check Engine Light coming on. My '89 740 did the EXACT same thing for a while. If you check out the 0-100km times the twin turbo 300zx is around the 5. Symptoms of a Bad Oxygen Sensor When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption. I've replaced it twice on my 1990 300ZX when it exhibited the exact symptoms yo describe. Braking is a critical part of a car and almost all car computers will receive data from the braking system. Other symptoms can include excessively long cranking time when starting cold, rough running on an intermittent basis, poor idle, stumbling or hesitation, a drop in mileage and stalling under acceleration. I had the injectors replaced twice by Nissan (once it burned while it was at the dealer for service!), both times under warranty, and I've replaced the alternator twice and the water pump about as often as I changed the timing belt. I bought a 1991 Nissan 300zx Non-Turbo 2+2 about four months ago. Sat for another year and now the new owner wants me to fix it. The performance chip loads new, pre-tuned motor specific fuel maps onto your ECU, and improves performance throughout the vehicle’s power band. He came back advising that there was a communication problem between the bcm, ecu and dash. There are a few things that can tip you off that there's a problem. Check all electrical connections. You may have to register before you can post: click the register link above to proceed. There is no direct link to the throttle from the accelerator pedal. 6 of a second delay between flashes “X” number of times, this will represent units of ten. How can I check to see if my jeeps ecu is bad? - Answered by a verified Jeep Mechanic. valve as described previously. What I don't know is if my OBD1 ecu is bad or if the conversion harness is bad. I've been searching all morning everywhere and I'm leaning toward a bad Power Distribution Center or ECU - but they are pricey so I'm hoping to get another opinion or 20. We at Fred Beans hope this guide to the most common symptoms of a bad crankshaft position sensor gave you all the information you need to diagnose any future problems you may have. I know first hand they are both good as the P30 ran a very good friends B16 swap just fine without a single issue, and the P72 was plugged in and started the B16 and idle'd it, but that was as far as I. Slower starts, with more engine cranking time than normal. Here are the most common symptoms of a bad ECU:Check Engine Light stays on after resetting. His wires (NGKs) were only a week old but they were bad. 1 X Air Flow Meter Suit Nissan 300zx Z32 80mm AFM MAF 22680-30P00. How to adjust the idle on a 300zx - Duration: 2:46. It's 1 o'clock in here, so I pulled the cover and started the engine. Replaced fuel pump. My '89 740 did the EXACT same thing for a while. Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve. The fuel temperature sensor is one factor that tells the ECU how to adjust the amount of fuel injected. Symptoms of a Bad Oxygen Sensor When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption. Learn the simple repairs you can do right at home, and which ones are best left to a professional. It seemed to be related to getting hot. Code P0345: Camshaft Position Sensor "A" Circuit Malfunction (Bank 2). Worst Model Year 1995 Worst Category engine Problems. Used Datsun 280Z & 280ZX Electronic Control Units. These sporadic engine problems may become more severe with time and may eventually cause electronic system failure. I was wondering has anyone ever had similar problems with the fuel pump control box? Either I have a bad ECU, Fuel pump controller, harness problem, or intermittent fuel pump problem. There are a few things to inspect, such as: a broken terminal, bulge or bump in the case, crack or rupture of the case, excessive leaking, and discoloration. Slower starts, with more engine cranking time than normal. Bad ECU Symptoms. Tacoma is a 6sp. Bottom line Do not jump start the machine or you run a good risk of frying your ecu. Check the shift solenoids that attach to the valve body, sometimes they can go bad. Order a fully programmed Audi ecu and save up to 75% off dealers list price. This is the Ipdm – Ecu Relay Problems, Symptoms And Solution. A bad knock sensor causes a decrease in acceleration and fuel mileage. Usually when the ECU fails it will also trip a code. Nissan OEM ECU Temperature Sensor SR20 KA24DE CA18 VG30 (Square Type) This is a brand new genuine Nissan replacement ECU temperature sensor (2-wire). On OBDII cars, the OBDII system will not only identify misfires but also coil and injector problems. Mine was bad years back, got some snow, snow melted and car wouldn't start. All our online auto parts, from headlights to side-view mirrors, and shocks and struts, are made of the highest quality materials and rigorously tested for longevity, direct fit, and function. Pressing the accelerator pedal had no effect. Learn vocabulary, terms, and more with flashcards, games, and other study tools. A Rundown of Symptoms and Replacement. by Eduardo Ruelas on. is stored, there is no malfunction in the skid control ECU. If the check engine light comes on before you start the engine, the engine starts and the check engine light goes out, the ECU is almost certainly okay. Looking for a 1991 Nissan 300ZX Valve Cover Gasket? Get yours at Wholesale Prices and Free Shipping over $50 only here at AutoPartsWarehouse!. He tried a different ECU to test his theory but with the new ECU the bike won't start at all. A friend of mine reminded me that you can see sparks on bad wires when it's dark. Therefore, it is best to get any ECU related work solved as soon as possible. Being the "complete with ECU" power kit from Ducati Performance, it also includes some Carbon mufflers, open airbox lid, washable filter, 14T front sprocket, 37T and 39T rear sprockets. However, here is the confusing part: The FSM says to check the voltage at the ECU to see if it is getting 10+ volts. I had the injectors replaced twice by Nissan (once it burned while it was at the dealer for service!), both times under warranty, and I've replaced the alternator twice and the water pump about as often as I changed the timing belt. We have known a knock sensor malfunction to cause extensive damage to an engine. If your vehicle is getting bad gas mileage or is having idling issues after the engine has warmed up, your ecu temperature sensor may be bad. There are 4 ways for you to diagnose if your ECU is causing problems in your car 1. I replaced the temperature sensor for the ECU, the temperature sensor on the dashboard, the crankshaft sensor, the speed sensor, the idle speed regulator, the air flow sensor. Symptoms of a Bad Oxygen Sensor When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption. The performance chip loads new, pre-tuned motor specific fuel maps onto your ECU, and improves performance throughout the vehicle’s power band. 3 Most Common Bad MAF Sensor Symptoms. So my advice is borrow a set of wires from a friend and see if there is any difference. Checked plugs and wires. Check the shift solenoids that attach to the valve body, sometimes they can go bad. 5 Bad Flywheel Symptoms and Replacement Cost Last Updated February 26, 2019 by autotechnician A flywheel is a round-shaped mechanical device that connects to the crankshaft which generates energy from rotation and then stores that energy for later use. If the clutch switch input is disconnected from the ECU, it doesn't know you're trying to start the engine and if there is a faulty crank sensor, the ECU can't tell you as it doesn't know it should be expecting it. If the ECU isn't working right, it could send incorrect or incomplete information, sending you on a rabbit trail down the wrong path. Most car owners are familiar with the orange light in their dashboard and the bad news it may be foreshadowing. Quality repair services for all vehicle control modules. Bad ECU on 2003 Cadillac CTS I have a Cadillac CTS (2003) that would not turn on and the key was stuck in the ignition. Used Datsun 280Z & 280ZX Electronic Control Units. The easiest symptom to recognize is when the "Check Engine" warning light illuminates on the dashboard. BASIC UPGRADES FOR THE 81-83 280ZX-T, and 84-89 300ZX-T Stock 280ZX -T HP = 180 @ ~ 6 - 7 PSI Stock 300ZX -T HP = 200 @ ~ 6 – 7 PSI Add JWT upgraded ECU can run about 11 PSI = ~ 225 HP $595. You can also find other images like ignition modual 1996s 10,ignition module replacement,ignition switch symptoms,ignition module circuit,starter solenoid problems symptoms,carburetor problems symptoms,transmission problems symptoms, and others. After replacing a few relays and testing the usual suspects with no success, I smacked the ECU when I was stuck on the side of the road. Funny thing is that the old ECU also runs and starts. The fuel temperature sensor is one factor that tells the ECU how to adjust the amount of fuel injected. Below are the top 5 symptoms of a bad engine control unit in a vehicle. Getting the ecu out in the 1g is actually kind of a pain in the ass, I'm used to easy access to my ecu in my 300zx. I can’t believe I didn’t notice when I bought her. Sat for another year and now the new owner wants me to fix it. he thinks his ECU is bad & is causing the problem. Failed PCM or ECU; How Serious Is The P0325 Code? The P0325 trouble code is of relatively low severity. Our Z32 EGR Removal Kit includes : 2 plates to block the openings on the bottom of the intake plenum 2 gaskets to go between the block off plates and the plenum 1 special bolt to rep. The x300s allegedly are known for ecu problems said my jd shop,, But what I determined is that my jump starting is most likely what caused the ecu to fry. 300ZX Fuel injection Diagnosis- by Steve Chong. #1 The transmission trouble code you have is related to solenoid, internal wiring, external wiring or trans computer. Tools Needed: – 10mm socket or Phillips screwdriver – Flathead screwdriver. Pressue within 1 lb of manufacturers spec. Only failure I've had in 91,000 miles. Re: Sensors and their basic failure symptoms I'd be looking at electrical stuff like wires, distributor and ICM. Slower starts, with more engine cranking time than normal. Bad Flash (possible bricked ecu) If this is your first visit, be sure to check out the FAQ by clicking the link above. A mass airflow sensor (MAS) determines the mass of air entering a vehicle's fuel injection engine, and passes that data to the Engine Control Unit, or ECU. I'm just hoping there's symptoms that set the ECU and fuel pump apart from other things. Honda: 5 Symptoms of a Bad Fuel System. Fuel injector symptoms for bad, faulty, dirty, clogged, leaking injectors: poor starting, idle, performance, fuel consumption, failed emissions, detonation. 5 Symptoms of A Bad Fuel Injector If there is something wrong with one or more of your car's fuel injectors, then it won't run properly, or may not run at all. Your mechanic can check it's functionality with the proper diagnostic equipment and experience. Search in titles only Search in Engine Management only. When you have a bad idle air control valve in your car, there are several problems and symptoms that will present themselves. my 300zx twin turbo Member Rides. Sure now it runs and starts. Did you check you old ecu at all? Even if the caps are bad you can usually replace them which is a LOT cheaper than a new ECU. symptoms of bad ESC module or ignition control module? Discussion in ' The Injection Section ' started by ChickenRammit , Aug 5, 2010. Have your John Deere dealer repair as soon as possible. If initialization is performed and learning occurs with an incorrect ECU installed, operations and functions will differ from that stored when the vehicle was shipped from the factory. These sporadic engine problems may become more severe with time and may eventually cause electronic system failure. You may have to register before you can post: click the register link above to proceed. However, here is the confusing part: The FSM says to check the voltage at the ECU to see if it is getting 10+ volts. I was prepared to have to buy a new/used ECU and have… Sia Electronics Inc - Auto Repair - 730 N Minnie St, Tilden, IL - Phone Number - Yelp. Common symptoms of a bad engine coolant sensors are overheating, hard starting conditions, poor idle, check engine light ON and the electric fans do not work properly. Log files are independently recorded and can be retrieved without downloading the entire ECU memory. If this is the case put everything back into place and you're all done ! If the ECU warning light starts to blink or the car acts funny IMMEDIATELY shut the car off and remove the cable from the ECU. 3 Most Common Bad MAF Sensor Symptoms. Of course, there are many possible reasons for why this warning light would illuminate. 4 ECU ECU Fuel Pump Control Circuit Repair Repairing Your Own LH 2. Sure now it runs and starts. The key just has to be to the on possition to send power to the fuel pump, and their is no power at the pump or beyond the open circuit relay. anyone help me! I believe the piece you are talking about is the PCV or positive crankcase ventillator tube, what allows crankcase air to go on a one way street up into. Below are the top 5 symptoms of a bad engine control unit in a vehicle. However, he seemed not too sure about what he was telling me. In fact some people call it the brain box. PLEASE USE PHOTOS TO IDENTIFY CORRECT ECU FOR YOUR VEHICLE. bad ecu symptoms? or asd relay? and ill let you know. The timeframe in which damage occurs is linked to driving conditions and/or the mechanical practices that were followed at installation. The Z1 Z32 ECU Upgrade is available for '90-'92 Non Turbo and '90-'94 Twin Turbo models. Some may be difficult to detect, leading to damage before corrective action can be taken. Do you know your car symptoms and solutions? The late 1800s brought the invention of cars by German Karl Benz. Braking is a critical part of a car and almost all car computers will receive data from the braking system. I've replaced it twice on my 1990 300ZX when it exhibited the exact symptoms yo describe. When your vehicle's U-joint begins to fail, there will be indicators warning you of its impending demise. Of course, there are many possible reasons for why this warning light would illuminate. Learn the symptoms of an MAS that needs cleaning, and how to clean it. Run the ecu diagnostic. I have also seen fuel pump relay turn on faults (ECU won't turn on the fuel pump),. The ECU stores diagnostic trouble codes when it senses a malfunction so a mechanic can fix it later. I've got a 99 LS, so I had to convert my OBD2 to OBD1. 75 + shipping with gold plated tips for excellent conductivity but a few members I have spoken with over the phone or PM's explained its a temporary fix and the original bored are junk, that the problem will come back eventually so the smarter decision is to swap the board out all together. Your mechanic can check it's functionality with the proper diagnostic equipment and experience. A voltage regulator maintains an even flow of electrical power to an automobile's electrical systems, including the headlights, dashboard components and the stereo. The car will crank but wont start. The B lead goes to the ECU and should be. Bad ECU Symptoms. The symptoms can be intermittent in nature, which can lead to a sense of complacency, but symptoms can suddenly worsen with no further warning. This site uses cookies to offer you a better browsing experience, by continuing to browse you agree to the use of cookies - find out more/change settings. I have the older PTU, which I read goes bad and I should get replaced by Nissan as it was on their list of recalls. What is an ECU? An Engine Control Module or Electronic Control Module (ECU) acts as the brain for your car. Torque management, boost levels, nitrous control, ignition correction and other functions can now be accessed and controlled via a cabin-mounted switch panel. Did you check you old ecu at all? Even if the caps are bad you can usually replace them which is a LOT cheaper than a new ECU. what does that do? Pls. I've heard of people having low fuel pressure, no starts, voltage present at the ECU but still doesn't turn on, sometimes no connectivity between ECU and vagcom, etcjust depends. I was mainly concerned about not seeing the CEL light before startup. How the idle speed is controlled. 4 ECU ECU Failure Modes Intermittent Stalling; Bad LH 2. There are some sure ways you can tell if your battery is bad by simply taking a good look. What Are the Symptoms of a Faulty Mass Air Flow Sensor? Signs of a bad MAF sensor may mimic problems such as low vacuum, low compression, or low fuel pressure due to a bad fuel pump. 0 config, disconnecting the AMM cause bad idle, with a lot of up and down variation. I just Bought this Car and I'm comparing it to my friends car and i believe i am missing that hose piece. Re: 109 Relay Symptoms? Cheapest way to diagnose is to simply replace the relay; it's a $20 part. Symptoms of a bad engine control unit The ECU is a vital component in modern cars because without it the car can stop functioning. One sure fire test is watching the Check Engine light when you turn the ignition on. The ECU on my 05 Pilot crapped out shortly after I bought it new. Brucato Power provides the best Mercury ECU replacement and upgrade for Mercury EFI motors available! Stock or custom fuel curves on the Brucato ACU will get you back on the water for $1350. I put in my old main relay with the "new" ECU. I'm also getting bad gas mileage, (not to the point of using as much as others but, not what it should)when I run ECU tests the only thing i get is inconsistant readings from the left o2 sensor (running rich, I mean lean, no rich, etc), but I would like to find the problem. Auto repair technicians at My Auto Solutions provide ECU repair for customers in the metro Atlanta, Georgia area. So, my alternator did test bad and was replaced, and I put in a new main relay before finally trying the ECU. See here for a step-by-step guide on how to diagnose and fix check engine light code P0345. Bad ECU symptoms. We proved a mobile ECM Flash service in Phpenix, Gilbert, Chandler, Mesa, Glendale, Scottsdale and Surrounding Cities. if nothing comes up - start the car (near your home), wiggle the connector on the crank angle sensor. 6i Club 5dr Auto (1998 - 2004 Model) Automatic 1598cc, which does not seem to match up to the e-map links in the earlier posts. Physically I don't see anything wrong with the ecu. The performance chip loads new, pre-tuned motor specific fuel maps onto your ECU, and improves performance throughout the vehicle’s power band. symptoms of bad ESC module or ignition control module? Discussion in ' The Injection Section ' started by ChickenRammit , Aug 5, 2010. ECU testing can be a challenge, even at the best of times. Intermittent starting problems. Chassis: Z32 300zx. if your ecm is bad, first off the car won't start, your fuel pump won't work, no spark, basically everything shuts down Ok the above can be symptoms of a bad ECM, But that's not the only answer. There are 4 ways for you to diagnose if your ECU is causing problems in your car 1. There are a few things that can tip you off that there's a problem. When a diagnostic tool is plugged into your car's dataport, it relies on information transmitted from the modules. My 300ZX began running VERY rough (car shaking), would not go past idle and would then shut down. Your Control Module headquarters for repair needs and rebuilt modules. I've heard of people having low fuel pressure, no starts, voltage present at the ECU but still doesn't turn on, sometimes no connectivity between ECU and vagcom, etcjust depends. Failed PCM or ECU; How Serious Is The P0325 Code? The P0325 trouble code is of relatively low severity. External sensors like the throttle position sensor, vehicle speed sensor inhibitor switch quite often go bad, causing these symptoms. Please right click on the image and save the image. If your car seems to run fine but the Check Engine light won’t turn off, your ECM may be at fault. I have a 1990 Nissan 300zx was NA but i swaped to JDM TT. What makes you think the ECU is bad ? A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama. This work was performed on a 1992 Dodge Stealth R/T Twin Turbo that has many taps into the connector wires. Skip navigation Sign in. The end result might be the same -- you can drive your car again, after all -- but engine control modules and units do sometimes go bad, and they aren't really designed to be repaired -- at least, not by the owner or by an average mechanic. Overheating ECU. The newer cars also use either the engine control computer (ECU, or Engine Control Unit) or a separate computer to shift the transmission. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in. So I replaced the ECU and the car idled like a dream. The fuel temperature sensor is one factor that tells the ECU how to adjust the amount of fuel injected. Nissan 300zx - Installing ECU Chip | Vlog 3 - Duration: 7:51. What I don't know is if my OBD1 ecu is bad or if the conversion harness is bad. Hahah i love how when one person says he hears a noise and thinks hes turbo is failing and everyone goes nuts. I have two, one new, one old both measure the same amount of resistance. The ECU switches the AAC on and off very fast and thereby is able obtain a gradual opening of the valve. 2007 – 2013) have a rare firmware fault. Grounds checked good up on the intake by the engine pull tab and at the core support. Noise is a classic sign of a bad wheel bearing or wheel hub bearing. Physically I don't see anything wrong with the ecu. Bad EGR and ECU Software on 2010 Golf TDI. Those are symptoms of an ECU issue. Rough running, ECU & Wire Harness 3 Answers. Since unplugging the ECU stops the pump priming, I think there's still some life in the ECU after all. Tata has done a wonderful job by using a ecu for the fuel pump and a cost effecive way to taclkle the stringent emission norms. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. After replacing a few relays and testing the usual suspects with no success, I smacked the ECU when I was stuck on the side of the road. It is, afterall, situated right on top of the engine, plugged straight into the intake manifold. Disclaimer" I don't know when the superseded part came out so a 2011? 2012 model may have the revised part already, If so the symptoms will be the SAME, lucky for you no ECU "update" is required NOTE: If your car doesn't require a ECM update replacing the TPS is a simple DIY repair. What are the good and bad sides of resetting your cars ecu? How long after the reset will the car re-learn again? Is there any symptoms that follow. The precise location of the symptoms, as determined by a physical exam or using electrodiagnostics, may be used to pinpoint where the damage might be. This is why you will have to either bring your Mercedes to our shop or mail us the original engine control unit so we can extract all the necessary information required to program the new unit. How can I tell if the ecu is bad on my 2001 Nissan Sentra? The car quit running suddenly and I have not been able to get it running again. When it went out, my Pilot would not even move really, it would start but not move. Symptoms of a dirty throttle body are these: 1. At Marine, we believe that members are more than a credit score. USED Ford Mustang Engine Computer, Mustang ECU, Mustang CCRM Display: Grid List. I'm new to forum and need some guidance. The key just has to be to the on possition to send power to the fuel pump, and their is no power at the pump or beyond the open circuit relay. Your car utilizes data from several different sensors in order to achieve optimum amounts of air and fuel. Have your John Deere dealer repair as soon as possible. Here are some ways to test your battery, and determine if it's bad. Order a Sprinter 2500 diesel computer at a discount price. After you install aftermarket parts, resetting the ECU will help your car's computer "learn" and accommodate the new parts. Symptoms of a Bad Crank Shaft Position Sensor 1. Re: 109 Relay Symptoms? Cheapest way to diagnose is to simply replace the relay; it's a $20 part. ECU was an $800 part. Check your Fuses for blown fuses. it worked well in the warm weather tho. In a nutshell, a simple chip swap for the engine's computer unleashes a power increase of about 25 percent, without having to make any additional changes to the car. If you car is post 1995 era, it should have some sort of ECU/Computer for warnings. before i spend on. Car was jump started on reverse polarity. It's 1 o'clock in here, so I pulled the cover and started the engine. ST4S With Ducati Performance Power Kit. ChickenRammit 1/2 ton status GMOTM Winner. New OEM Mass Air Flow Sensor found on all 1990 + Nissan 300ZX Z32 Models Twin Turbo (TT) & Normally Aspirated (NA). I was mainly concerned about not seeing the CEL light before startup. The Top 5 Bad Symptoms. Find out what you can expect to pay for ECU repair, the 5 symptoms of a faulty ECU, and the technology of ECU diagnostics. These can also cause issues with idle control problems as well as cold or hot start problems. If it is much lower than this then you either have a bad cell or discharged. Estimate does not include taxes and fees. However, here is the confusing part: The FSM says to check the voltage at the ECU to see if it is getting 10+ volts. Out of curiosity- What are some symptoms or related problems which would happen due to a ECU/ECM going bad/failing? I heard from my mechanic that one reason to tell is that MB AUX fans will go on repeatedly as an warning sign?. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. Symptoms of a Bad Fuel Filter. After a little research I came to find out the ecu went bad. Usually a bad or failing ECM will produce a few key symptoms that can alert the driver of a potential issue. If you hear a knocking or pinging sound, you could have purchased gas without the proper amount of detergents. An idle switch regulator also known as a idle air control valve a code 23 for a Nissan 1986 300zx is located on the intake in the center on the passenger side of the Z it has 1 wiring harness and two hose placements one on the front and one on the back difficulty taking this off little if any. For the first month It was running fine besides an occasional minor stutter while idling and sometimes a little hesitation off the line. I've replaced it twice on my 1990 300ZX when it exhibited the exact symptoms yo describe. 0 AUTO ECU PCM COMPUTER ENGINE W4H0. Edit: 265/75/16 e rated tires, stock wheels, lifted 2in on OME shocks. Tata has done a wonderful job by using a ecu for the fuel pump and a cost effecive way to taclkle the stringent emission norms. Diagnostic Trouble Code Display Solution; ECU 000636. 1) Inspect the Battery.