350z bad ecu symptoms

Log in.

Do you have questions? Trying to post in the Marketplace? Need help? Introducing Infinite Scroll - Click here to learn more! Thread Tools. Sooo my car is really stressing me out, and i would really..

350z bad ecu symptoms

When conditions change, the ECM will automatically make adjustments in real-time. That is why it is so important to recognize the symptoms of ECM failure. The ECM controls a number of systems, but the most important ones for our purposes are the air to fuel ratio, the engine timing. It also controls the transmission in automatic transmission vehicles, and valve timing on vehicles with variable valve timing. This is superior to old, mechanical systems, where you had to adjust the carburetor from time to time or have the engine timing tuned. When an issue arises, the ECM will log an error code that lets you know the source of the problem. This can be advantageous since you can determine the exact cause of failure. The most common source of ECM failure is in one of the wiring harnesses. If the wires to the transmission or fuel injectors become corroded, they can lose conductivity, leading to a failure. Fortunately, these issues can usually be resolved by replacing the corroded wires.

Find More Posts by nismomaxct.

Thread Tools. Helping a customer to trouble shoot a VQ swapped Spec V.. I've never had a ECU go bad, but I think that's what we've narrowed it down to. Here's the symptoms and what we've tested: Car died suddenly at highway speed was raining heavily No spark at all Can smell fuel while cranking Fuel pump primes ECCS relay is working: - power at coils, injectors, MAF, crank and cam sensors All fuses check out No codes Replaced crank sensor with new one from Nissan The fact that he is getting 12 volts switched to all of the sensors, tells me that it's not the ECCS relay. The fact that the pump primes, and he smells fuel while cranking tells me that the injectors are working. No spark with good voltage and ground means that it pretty much has to be the ECU. Anyone else ever have a ECU go bad?

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I just bought my first BMW about 2 months back and so far I've loved it. I took it for an emissions test a few days ago, and it failed. The OBD sensor they hooked up to it kept returning the message "unable to connect". I took my car to autozone to give it another shot and they were also unable to connect. So far I have checked all of the fuses and they seemed to be ok.

350z bad ecu symptoms

What's your thoughts. ECU problem? Thread Tools. I have an 86 non turbo automatic I have a problem with the number 3 fuel injector staying on It's not physcally stuck open put it is receive a constant pulse As shown by using a noid light. The interesting thing it seems to happen when The fuel pump is running even when you turn the key on without starting the car and the pump is priming the fuel system Any ideas? Is it simply a bad ECU? View Public Profile. Find More Posts by mvpz.

Astroyogi

Find More Posts by djamps. Need help? Did you trouble shoot your wiring? Yes Kshep, it was a faulty ECU. It had something to do with excess vibration and the TB. Originally Posted by bmccann I win :clap: I'm not sure the extent of the service managers search, but he said they looked to see if there was any history of anyone else having this problem and it came up negative. I'm stressing! The service guy has been top notch. If you already have a mechanic you trust, take their advice. Swapped the ecu and now I can communicate with it again. First time, shut engine off then turn it on, however this time didn't work. Come join the discussion about performance, modifications, troubleshooting, exhaust, turbos, maintenance, and more! Installing a new starter can also cause ECM failure. Find More Posts by ranmas

Log in. Sign up. JavaScript is disabled.

Looks like we roll this weekend :shiftdrive: So Posting Quick Reply - Please Wait. I had a UTEC installed that ended up going bad and it was uninstalled. Good luck Of course, there are other reasons a car may not start, including a bad starter or a blown alternator. Did you open up the ECU and resolder the connections? Kasen 10 Replies. Find More Posts by chodalak. Once they completed all the tests they were certain it was a bad ECU. At least that's what the dealership told me when I was thinking about trying a new ecu. Had to reset my ECU. Quote message in reply? Need help? Received 9 Likes on 9 Posts.