John Deere4240
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- Oct 6, 2025
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- Buick Ownership
- 1991 Buick Riviera
My 1991 Buick Riviera with 90,000 original miles started to stall when coming to complete stop.
3800 engine would start right back up this continued on/off for couple months. Now it starts very hard and acts
like its flooded. Have to put gas pedal to floor and barley runs! Code refered to bad o2 sensor, I replaced that turned
the key started right up let engine run for awhile shut engine off and started running like crap again. Checked fuel pressure
was very bad, replaced fuel pump and filter again started running fine again drove car 1 miles started acting up again!
I now have replaced crankshaft sensor, the computer, mass airflow sensor, idle control valve, new spark plugs, coils, ignition control
module, fuel pressure regulator. I don't know what else to do? Have not replace cam shaft sensor but their is no code fault
what in the world can this be? I've put 20,000 trouble free miles on this car, has no rust i'm just confused please help!
3800 engine would start right back up this continued on/off for couple months. Now it starts very hard and acts
like its flooded. Have to put gas pedal to floor and barley runs! Code refered to bad o2 sensor, I replaced that turned
the key started right up let engine run for awhile shut engine off and started running like crap again. Checked fuel pressure
was very bad, replaced fuel pump and filter again started running fine again drove car 1 miles started acting up again!
I now have replaced crankshaft sensor, the computer, mass airflow sensor, idle control valve, new spark plugs, coils, ignition control
module, fuel pressure regulator. I don't know what else to do? Have not replace cam shaft sensor but their is no code fault
what in the world can this be? I've put 20,000 trouble free miles on this car, has no rust i'm just confused please help!
