Mechanics

CAR BUCKS AND STALLS WHEN IT IS COLD

1995 Infiniti Q45

Engine Performance problem
1995 Infiniti Q45 V8 Two Wheel Drive Automatic 90,000 miles

The car starts fine in the morning, but after I back out of driveway, it will stall, then stall again almost every time I come to a stop and cuts out while driving (sounds like it is going to stall) This behavior keeps up until the engine is hot - or if I shut it off after traveling 5-10 miles and it sits shutdown for 30 minutes or longer (then it runs fine) Gas is good, fuel filter has been replaced with no improvement. What should be the fist thing I should check that could be the likley cause?
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Nikinvegas
January 19, 2010.



Hi nikinvegas,

Thank you for the donation.

Symptom indicates a fault in the idle control system and the most likely cause is a dirty throttle body and Idle Air Control Valve-Auxiallary Air Control valve ( IACV-AAC). Get them cleaned and retest.


http://www.2carpros.com/forum/automotive_pictures/192750_EngComp95InfinityQ45Fig01_1.jpg


KHLow2008
Jan 20, 2010.