After the car warms up, putting it in gear makes the rpms drop to 680 and stay there! Same with air conditioning. You turn on the air and the rpms drop and don't come back up. The thing is, when it's cold the Idle air control works exactly as it should. Only after the water temp passes 72c do the rpms turn to crud. I've run every test I can find and have even come down to that humiliating ritual of swapping parts. The only info I can find in print on this problem is on Alldata. The trans troubleshooting section says if you have this condition that the ECM is bad. I swapped computers with my other 95 Jetta and it displayed the same exact problem. The only thing is, the computer didn't have the exact same code. It was an AA and the one with the problem is an AH. Could it be possible that it's still the computer and I need to get one with the same code? I find it hard to believe that it would have the same problem, PLUS I put the computer from the trouble car into the donor car and it ran normally. Any help is appreciated.
Tim