Ok, so we cleared all codes with the blink code reader and reset the ecu. Afterwards, we drove the car around for about 2 minutes without a problem before getting the fluctuations again. When we brought the car back, we had a code #5 and 8. We cleared those codes then drove it around some more and the problem persisted, and the codes appeared again. We also disconnected the MAF and it didnt make a difference.
Last edited by greasemonkeyjoe; 11-17-2012 at 08:24 AM.
When you replaced the wiring harness did you check the wiring from the harness connector (X1) to the throttle actuator. Mine was also deteriorated and I have to replace the wiring connecting the actuator to the main harness.
The actuator has two potentiometers which read the throttle position, one goes to the CC module and the other to the ECM. There is a throttle stop switch and the throttle actuator DC motor. If any of this wiring is shorted, you will have strange ECM behavior. These codes point to an issue with the throttle actuator or wiring. Look at these items closely.
You MAF is probably fine if you are not getting codes #4 and (or) #13.
yes i did replace the harness to the throttle actuator. All i did with the throttle body and engine harness was cut out one wire at a time, then re-sodder and heat shrink all new wires in. Now im second guessing... maybe i screwed something up... im wondering if i should just buy a brand new wiring harness and throttle body. ugh! but thats alot of money
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