Engine & Internal Chat about beefing up your engine's insides here.

Idle fluctuating

  #2  
Old 01-05-2009, 12:38 PM
JimBlake's Avatar
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Default RE: Idle fluctuating

How about the FITV? Sorta like the AICV, but its mounted to the underside of the throttlebody, & its job is fast-idle when the engine is started cold.

Then maybe you have to go thru the whole process of adjusting your BASE idle.
 
  #3  
Old 01-08-2009, 08:02 PM
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Default RE: Idle fluctuating

tha fluctuacting has some to do with the computer trying to drop the idle but failing, i cant remember what the problem really is i was half a sleep in auto tech at school lol
 
  #4  
Old 01-08-2009, 09:06 PM
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Default RE: Idle fluctuating

Since the engine is warm, that takes the FITV out of the suspects. Since you cleaned the IACV and it still idle odd, the IAC sensor itself may need to be replaced. Before you go buying one, double check that you cleaned out both the upper and lower bypasses in the intake manifold (in front of the throttle butterfly) and the ports on the other side of the throttle butterfly.
 
  #5  
Old 01-09-2009, 06:50 AM
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Default RE: Idle fluctuating

Warm engine doesnt take the FITV out of the picture. The popular way for that to fail, is its internalsget loose, so it does NOT CLOSE when hot (like it should).
 
  #6  
Old 01-09-2009, 09:43 AM
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Default RE: Idle fluctuating

Thats true, Jim, sorry.

You can take the FITV off and heat the end of it with a lighter (dont put it in the direct flame) and see if it closes all the way, there was a DIY with pictures that I followed a few years ago when I had the same problem.
 
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