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Reply To: 02 lesabre 3800 engine racing issue

July 18, 2019 at 11:12 am #551880
ED56
Participant

I have the same issue with an older Buick Regal 1990 have been working on it for a month. Two new TPS’s, 3 new IAC’s, 3rd ECU, new temp sensor. Still off to the races. When I reset everything and put ECU into learning mode all is good next morning hard starting, races, Dies in reverse and almost stalls first time you put it in drive and step on the gas. I checked fuel pressure 40PSI on the nose replaced fuel regulator, Fuel Pump and fuel filter still no change. Taken to two mechanics, not a clue. Neither could find a vacuum leak in the system. No codes no service engine light just runs like a sick dog. I sure hope someone from GM chimes in this only has 60,000 miles on it but may go to the shredder sone if I can not figure this out

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