Replaced ECM-problem solved
Thread Starter
Heel & Toe
Joined: Feb 2006
Posts: 22
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From: Columbus Ohio
Replaced ECM-problem solved
A month ago I wrote about my starting problems and erratic idle.
It would take 3 or or more starts to get the engine running. The idle would go up to 1300 rpm for up to 10 minutes, then down to 700. My radiator cooling fan would start running immediately. After 15 minute idling the cat would glow red. If I turned the AC on the engine died. My generic GM code reader did not display any codes, not even code 12. I flatbedded the Corvette to my mechanics shop. He had 2 different code readers/scanners. He could not get any codes. He checked for vacuum leaks, fuel pressure, TPS, idle control unit and several other items. Finally he put in a GM rebuilt ECM - eureka everything back to normal. He used the old chip which was ok. BY the way I did have the original GM shop manual.
1989 red coupe aotomatic with 14500 miles.
Gatis
It would take 3 or or more starts to get the engine running. The idle would go up to 1300 rpm for up to 10 minutes, then down to 700. My radiator cooling fan would start running immediately. After 15 minute idling the cat would glow red. If I turned the AC on the engine died. My generic GM code reader did not display any codes, not even code 12. I flatbedded the Corvette to my mechanics shop. He had 2 different code readers/scanners. He could not get any codes. He checked for vacuum leaks, fuel pressure, TPS, idle control unit and several other items. Finally he put in a GM rebuilt ECM - eureka everything back to normal. He used the old chip which was ok. BY the way I did have the original GM shop manual.
1989 red coupe aotomatic with 14500 miles.
Gatis
