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2000 Infinity idling rough sometimes

Tiny
JASTAD
  • MEMBER
  • 2000 INFINITI QX
  • 6 CYL
  • AUTOMATIC
  • 98,000 MILES
I have a 2000 infinity QX4, V6. The truck has recently started to run rough at idle in cycles. The truck starts fine and idles fine for about 1 minute, and then it will idle rough for approximately 30 seconds and repeats the process of idling fine for 1 minute and then idling rough for approximately 30 seconds. It will only do this at idle. I checked to see if it was due to the AC compressor kicking on, but the AC Compressor never did. I also checked for Vacume leaks and didnt find any.
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Monday, December 6th, 2010 AT 9:36 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Seems the idling speed is too high causing the problem.

Check the coolant level.

Check the IAAC valve operations.
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Monday, December 6th, 2010 AT 9:45 PM
Tiny
JASTAD
  • MEMBER
  • 8 POSTS
The IAAC is the Idle Air Control?
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Tuesday, December 7th, 2010 AT 7:43 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Yes, Idle Air Control Valve.
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Wednesday, December 8th, 2010 AT 6:50 PM

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