2000 Infiniti G20 Idling inconsistency

Tiny
PHILFOSTER440
  • MEMBER
  • 2000 INFINITI G20
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 13,000 MILES
The car had a tune up a few months ago with a new a new air filter and spark plug wires. Acceleration and gas mileage iare great. The problem, is when I'm at a stop light after 60 seconds I get a sudden drop in the RPM, this last for a second for almost every 60 second I'm stopped at light, but the car does not die out. This only happens when the car has been driven for at least 20 minutes. When I put the car in park the same thing, but the rpm drop low enough for the car to die. What is this?
Friday, January 4th, 2008 AT 6:05 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
With no check engine light, this would be a guess, but not unusual, check your Idle air control valve, it's bolted to the side of the throttle body. Also could be a vacuum leak, but it should happen all the time!
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Friday, January 4th, 2008 AT 6:29 PM

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