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View Full Version : Sound like IAC needs cleaning? Also more belt slippage...


MrBluGruv
10-12-2010, 08:51 AM
When I start the car up, especially in the mornings, but mostly any time it's been sitting for an extended period of time, I'll briefly get idle surge similar to that of blower surge, except at a much faster rate. I found this morning that it is GREATLY exacerbated if I very gently press the throttle while still cold, like just enough to open the TB. The car also has a sort of rolling vibration in the engine at any temperature as well, as a few others have described.

I've just recently cleaned the MAF sensor, but I don't recall if I've ever don the IAC. You guys think that's what's giving me grief?


Also, I've found that with the cooler temps my belt seems to be squeaking again, but only briefly on startup. In the morning it's been dipping into the 60s down here, and the dew point is so close to the temps every single day that my car is covered in moisture as well. Can anyone that's used dayco belts testify to any problems with cooler/colder temps and/or heavy condensation causing belt slippage?


Thanks guys.
omarauder
10-12-2010, 12:41 PM
Was everything ok before cleaning the MAF sensor? If so I'd double check that area for leaks etc...
MrBluGruv
10-12-2010, 07:38 PM
No actually, this problem was there before the cleaning. I feel pretty confident that it had nothing to do with it, I thought it would've at least helped a little but hey, at least my MAF was ok. :P
visionmercury
10-12-2010, 08:35 PM
i have the same problem with mine , tell me if the cleaning the iac helps any , i was going to clean my throttle body this weekend, i may just pull it out and clean it too
babbage
10-13-2010, 06:39 AM
IAC isn't hard to remove and clean. It may be full of carbon and oil deposits.
MrBluGruv
10-13-2010, 05:01 PM
Well, as of this evening car is in the shop to (hopefully) put an end to the rear-diff problems I've been having with the car. This weekend once I have it back I'll clean the IAC. Are there any other components than the IAC and MAF that I could check or clean that would possibly cause a rough idle?
babbage
10-13-2010, 05:47 PM
DPFE, Fuel Filter, plugs, cops, O2 sensors, fuel pump, iac, maf... Lots of things can cause a rough idle. I'm going though the list myself... I may have a vacuum leak.
BODYMAN
10-13-2010, 06:26 PM
i have the same problem with mine , tell me if the cleaning the iac helps any , i was going to clean my throttle body this weekend, i may just pull it out and clean it too

I would recomend doing that along w/filter & MAF that just did that today and and . I was stunned how smooth the idle was afterwards & thats considering I didnt have any problems at idle before doing and still noticeable diff.