It’s a huge worry! I have a 2009 Saturn Vue with 132,000. I figured is was good. The Subaru community is a very active and helpful one.
They then call me and tell me that my starter was now making a loud noise so that would need to be replaced as well. after changing the spark plugs and ignition coil packs I was still getting the failure. lights, applications, sensors…? Copyright © 2020 ECU Testing LTD. All Rights Reserved. The thing is I took it to mercedes repair shop they opened the ECM and said they found corrosion in it and that it’s hard to define the actual reason for the failure. It’d probably be best to take it to a shop. it turns over though. Transmission dropped out of gear and won’t go back into gear. Check for technical service bulletins (TSBs) on your car related to misfire codes. Checked the back pressure of the one cat and it was good. These injectors were to be like a factory upgrade injector without having to retune the motor. They tried to jump start it (don’t know if smth stupid happened there, incorrect connections) and when I went there I air-sprayed at ECM cables and drops of water came out. It idle is a little rough and has no power. I have 07 Yukon with a 5.3 in it. I have an intermittent ECU problem that seems to happen mainly in the morning when the headlamps are on , any ideas ? You can check for vacuum leaks using a smoke test. The fuel pump I have now has the pressure of 50-59 psi. This is a very common failing ABS pump for the 2001 - 2008 Honda Jazz.
If an overheating issue is left unchecked, it can cause a more serious problem such as blown head gaskets (assuming that’s not the root cause).
Honda Civic Gen Tech and Builds / Show Offs, Thank you man, just got home from school so I'm gonna try and take a look at it now. Not sure. We had it checked and now we are getting a code related to voltage and the ecm. How was the ECU identified as the root cause? Check engine light was on and reading fault codes in regards to the transmission. 4. If the corrosion is not cleaned away quickly, it will cause these components to get damaged. I change the cylenderhead gasket and oil seals due to leak but when i install all the parts and wirings and start the engine the engine only works in seconds and stop. 2.
Mechanic told he has no idea why fuel trims off and that I should change the ECM. But IAC wouldn’t cause it to stall while driving since IAC is only active while idle. For any further electrical troubleshooting, you’re going to need a multimeter and a wiring diagram for your vehicle handy. I’d poke around a bit more, then check for the presence of fuel and spark when you crank it. So I dont think IAC is my problem unfortunately. It runs great so long as the codes don’t go off. Could the initial problem have been the ECU and not the transmission?
I recently bought a 00 civic with a B20 swap. 3. If you attempt to jump start your vehicle with the cables attached incorrectly, then it could short out your ECU by causing it to spike too quickly.
We ran codes and changed all the sensors that were identified. I would do a bit of searching on the forums to see if you can compare your numbers to those of other owners with the same engine. And…cooling fans run at high speed from startup to 15 minutes after shut down even with cold engine and A/C off. Set the cover aside. Changed O2 sensors, MAF, fuel pressure regulator, ERG, and ECT. This is the only way to reliably narrow down the problem scope and find the root cause. There is wiring that runs into the harness of the ECU where you can check the voltage amount. Honda CR-V ABS pump module problem (ABS & VSA light on), ECU (Transmission Combined Clutch Actuator). Think of it as the vehicle’s brain. After changing all these parts a lot of the misfires went away and it did run better. I am more concerned with the short term fuel trims rising as you increase engine speed. Took my 2011 Dodge Grand Caravan to get inspection. If you hooked up the jumper cables backwards it could be any number of things.
That’s very strange. from what you’ve listed here I’m guessing that the voltage is too much or too little and shorting out the ecu. Hi Sean.. thanks for the reply. It is also often referred to as the PCM (powertrain control module) or ECM (engine control module). Originally, the civic was an auto but the motor swap was from a 01 CRV, and now the car is a 5-speed manual. Any idea where to start?
High fuel consumption and black smoke could be an indicator that the car is running rich. Honda Civic Gen Tech and Builds / Show Offs. JavaScript is disabled. He also said there is a possible internal fault in the PCM. If any of the cells in your car battery are dead, then your ECU is going to fail soon afterward.
Make sure the terminals are tight and free of corrosion. Had it tested and the system overall is good but a command from the ECU is disallowing the compressor to engage. ECU acting up do you think? Can you tell me if the RAC done a diagnostic on my car and it came up with ECU problem Can a battery cause that to come up as a ECU. After changing the fuel pump 3 times before getting one to operate at somewhat of that 55psi range. Well, I agreed to have them test it further because these codes only go off intermittantly then stop for a couple days, then start going off again. Do you have an idea? i changed fuel pump,spark plugs,battery starter still will not start. See if the factory manual has a procedure for testing the ECU. Most thermostats are mechanical devices, not really sensors. The engine light won’t shut off.
Didn’t check the other cat though. It started while I let my foot off the throttle as I approached a stop light. Once open, this brings cool water (or coolant) from the radiator into the engine and allows the hot coolant to move to the radiator, where it is cooled before reentering the engine block. I thought the ECM and PCM were the same – are they 2 separate modules in a Saturn? Do note that fuses probably won’t protect the ECU if there is a bad connection on the ECU’s circuit board that is causing some short or open circuit. It comes down automatically and its also raise . The engine and drivetrain are the most dependent on the ECU. When I reset the computer via battery disconnect, it idles perfectly for a while. You might consider pulling the injectors and either have them cleaned or tested to make sure they aren’t clogged, but since the misfires were across multiple cylinders I am more inclined to believe it is an issue with the fuel pressure regulator or fuel rail on bank 1. Took it to another mechanic who looked at it and told me he has no idea what’s wrong with it but doesn’t think its the ECM. When the wax up it melts and expands, pushing the valve open. A/C will not turn on. Try switching the spark plugs and injectors around and see if the problem follows them around. Check for recalls, and check to see if your car is under warranty. The fact that your short term fuel trims are around 0 at idle is a good sign. Honda vs Toyota: Which Brand is More Reliable? Thanks. Once the thermostat cools back down below its designated temperature, the wax solidifies and the valve closes again via a return spring. Thank you for your support as we help keep the UK’s critical transport services running. Moisture is a bad thing to have in an ECU because corrosion will form on its components. Are these ECU symptoms? I know very little about the swap that's what's causing the most problems, but I'm gonna start dig into the internals, fluids, tranny, and so on over the next few days to get her up and running perfectly. Thread starter Start date May 9, 2017 New Member. It’s possible the ECU could misdiagnose, but it’s highly unlikely.
Service told me the ECU will need to be replaced. Sorry just thought of something else too… I did replace the fuel regulator and it seems to be working… but when I was doing the smoke test a little smoke was weeping out the very top of the regulator. My 2010 Toyota Corolla has a misfire in cylinder one.I have got new coils and my injectors are good.I have checked for a head gasket that is also good to.What could it be.The motor is a 1.8. I called the RAC out they have told me I have a ECU problem And the car has had it . Check the flow rate on the injectors to make sure they are similar to the factory ones. Open the hood and look for the fuse box, which is located near the passenger's side. You won’t be able to even start your vehicle and get the engine running. You may find a manual for free by googling “07 Yukon factory manual”, but Haynes and Chilton manuals are inexpensive and do a pretty good job. My car can start perfectly fine one day and the next not start at all completely dead no radio no lights nothing which can last a few days and out the blue starts again. Think of it as the vehicle’s brain. Normally I'd just swap the parts out but my boy told me that it could be the ECU and not the parts themselves. It’s really hard to say without knowing the initial state of the van.
The ECU has seals around it which are supposed to prevent moisture from entering inside. P0506 and P0507. I have a tech 2 scanner I’m using. I recently bought a 00 civic with a B20 swap. When the ECU has any issues, it can cause all sorts of problems with the vehicle, and in some cases even render it undriveable. This electronic module is a built-in computer which your vehicle depends on for managing a variety of its systems and functions. More diagnostic testing is needed before you can get an accurate repair estimate. 2001 Mitsubishi Eclipse GS 4 cylinder 2.4L 215,000 miles, BTW I did get 2 IAC codes.
Changing each sensor isn’t going to help in this situation, since the problem is with the wiring somewhere. Make sure the o-rings on #2 and #6 are sealing properly. This can end up costing thousands of dollars in expenses. Read also: Car Immobilizer: Basic Function and Bad Symptoms. Checked for actual spark… and that was good. My LT fuel trims are pegged at 25% and the short terms are hovering around 0 at idle. Are the fuel trims off only on cylinder #3?
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