350z bad ecu symptoms

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Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. As I made my way onto the off ramp my Z suddenly lost all throttle response, SEL came on slip light came on, and no matter how much gas I gave it, the rpm's never made it above Of course I was freaked out, first thing I thought was the ECU finally made up it's mind to take a dump because of the exhaust mods I added. I then shut the car off sat there for a few minutes and started it up again.

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. If one of the wires shorts out to the frame, the ECM may fail entirely. This can also happen due to power surges due to a lightning strike or arc welding on the vehicle frame. Installing a new starter can also cause ECM failure. This is because they often bypass the surge protector on the ECM, leading to a power surge when you start the vehicle.

A failing battery can also cause ECM failure. Quote message in reply? These range from emissions problems to faulty O2 sensors to problems with the ECM.

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. The gauge reads around PSI before the car is even started, and reads above the max of PSI when it is operating. Not sure, but I believe the gauge normally displayed 0 before the car was started. The car was purchased after being involved in mild accident.

350z bad ecu symptoms

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For a better experience, please enable JavaScript in your browser before proceeding. I'm not sure about compatibility across models and years. For expert advice, contact one of our specialists today. Replacing the faulty sensors should resolve your issue. Thread Tools. I call my service guy and give him the details, wants me to bring in the next day. I think rhis caused my problems. It had something to do with excess vibration and the TB. This can also happen due to power surges due to a lightning strike or arc welding on the vehicle frame. I hoping to take some before and after pictures since I plan on doing a slight drop on the car sometime next week.

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Thread Tools. It was the first time this dealer had the problem or heard about it. The ECM controls a number of systems, but the most important ones for our purposes are the air to fuel ratio, the engine timing. Find More Posts by nsnrider. In this situation, replacing your battery will usually solve the problem. One other thing that confirmed that I had done nothing to cause it was the fact that when they used there computer to run a code check, the computer had no problems reading. Send a private message to TurboS13Hatch. Did you open up the ECU and resolder the connections? I'm going to get the new ECU, and flash it for dollars at Nissan, i gotta some how get the car into Nissan Advanced Search. No spark with good voltage and ground means that it pretty much has to be the ECU. Thread Tools Show Printable Version. It's great the dealership is working for me, considering the bad past I've had with them. It also controls the transmission in automatic transmission vehicles, and valve timing on vehicles with variable valve timing.