Originally posted by GreenHornet:
Does anyone know anything about having to replace the ECM?



If the trouble is truly the ECM and your vehicle has less than 100,000 miles on it, and is less that 7 years old, the Dealer will have to replace it under the federal emissions warranty of your vehicle.

Usually, when the ECM is posting codes and the engine is running, it has not failed. Now if you have jumpered your car "backward" and have "cooked" the electrical system by this polarity reversal, then you could very well have destroyed the PCM. That aside, I'd suspect that cheap Contour wirining harness from the PCM to the engine. The wires are know to have insulation cracks, the connectors get brittle and decompose in a short amount of time, and when you add a little seeping engine oil, road salt, and rain water... well... things begin to go wrong in a big way.

Head over to "Wally World", plunk down $80 for a code reader, read the PCM codes, and post them here. It is quite possible that a single fault is creating a "ripple effect" and generating other codes. Example; MAF is reading high due to an insulation problem, causes fuel injectors to run rich, causes upstream O2 sensor to read ultra rich, and then the downstream O2 sensor reads rich indicating a faulty cat. The PCM tries to adjust and reaches programmed limits. This will leave quite a few codes in the PCM, although the cause is only a single simple issue.

Keep the code reader until you are done, and then take it back to Wally-World for a full refund.

Post them codes!