My 85 park avenue with a 3.8 idols extreamily rich
Asked by GuruW82VM Jun 29, 2018 at 11:31 PM about the Buick Park Avenue
Question type: Maintenance & Repair
When the car is warmed up, at an idol it will run ritch enough to
stall the car at times. Seams to happen on hot and humid days.
Every thing looks good and l really dont see why it would want to
run so rich. And no chk engine light.
4 Answers
This could be.. l will do an injector leak down test.
Today is hot and humid again.. did leak down test... fiel psi held for 60 seconds. So they appear to be sealing. When l start the car hot it will run ok untill it goes into closed loop. ( a matter of seconds ) and chugs in closed loop. If l shut the car off and start it again same thing.
vacumn leak..........could be a hose or bad gasket. Once the engine warms and the system goes to standard mixture, you are getting too much air and the engine will stall.
No.. vacume problems.. it runs rich. I can see the exh is gray with unburnt gas and o2 guadge goes full rich So does scaner. If the maf is funkey and the computer thinks its getting lots of air will the computer add fuel to compensate even though tps is closed and rpm is low ( at idol)? But no engine light??. Bulb is good for engine light.
