Quote:
Originally Posted by Vtx531
I pulled the negative terminal of the battery to try and reset the ECU. Let it stay disconnected for about 10 mins. When I reconnected it the car ran really rough, missing and knocking a bit (through the intake). I would have though that would reset the fuel trims and it should have ran a lot better initially? Ended up smoothing out after a minute and runs good now. No check engine light yet.
What is the proper way to reset fuel trims or ecu on this vehicle?
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Its normal for the engine to run like crap for a bit after resetting the ECU. Resetting the ECU also resets the fuel trims. The ECU will continue to vary the fuel trims as you drive in varying conditions (cold, warm, hot, idle, mid-throttle, full throttle, etc) to find the optimal settings.