I have a 91 Buick Riviera. I recently had the fuel/air sensor replaced. The car starts and runs good from a cold start or a hot start (15 minutes or less from turning off). However, if the car has been running and the temp is stablizied hot, then it is turned off, and I attempt to start it after 20-30 minutes but before it cools down totally I have the following problems:
1. rough start or unable to start
2. if it does start, there is rough idle and no power and engine will die within minutes
3. need to wait a few hours until cold, then everything runs perfect at all speeds and load conditions.
Please help. Thank you
Pasquale Girolamo
Optional Information:
1991
Buick Riviera 6 cyl
Already Tried:
I'm told my fuel pump is not at rated pressure, however there is no fuel starvation at any speed.
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