Posted: Thu Jul 05, 2012 3:46 pm Post subject: Irratic Idle help
Hey, yall. . . I haven't been on here for quite a bit. The Impala has been doing great without issues, till now.
We just did a 19 hour drive to nowhere and back in the AZ heat. The car ran great the whole way until I let my retarded friend drive it(I doubt that's what did it). He drives like a retard maniac just flooring the car off the line every time. . . Douche bag
But either way, the car never over heated. Just got to the half mark and that's it. . . But, when we were getting close to home I noticed it was idling a little rough at times. Then I noticed the idle will just stay high at times even while driving. It will idle and drive @ 35MPH without your foot on the gas, but not always(maybe about 50% of the time).
I looked everything over and it looks fine so far. But, I haven't started taking anything apart. I googled it and found anything and everything from intake manifold gasket to IAC.
Any help would be greatly appreciated. . . Never had any other problems with the car for 60k except when the harmonic balancer fell apart, cooling fans started squeaking & the radiator cracked. Nothing major though.
Ever cleaned your throttle body? At one point mine was sticking slightly open due to a large amount of carbon built up around the plate. I pulled it, removed the sensors and cleaned the carbon off, put a new gasket on and put it back together and everything was good to go.
Protip: If you don't know what you're doing, don't do it.
Gave it the GM once over, cleaned the MAF, the throttle body, air filter and swapped the IAC. Runs like a different car.
The IAC was getting stuck for some reason. And the change that you can notice is the MAF cleaning. It's one of the most important sensors. I seen a Monte Carlo buck like a horse and Aamco couldn't figure it out. I just swapped it for the one on our car and it ran perfect. Then cleaned the old one and it was just fine.
Ha ha, got it scanned. . . 0443. . . Oops I forgot to connect the evap solenoid. I broke the tube coming off of it. I took it off and JB welded it up then reinstalled it. Then forgot to connect it. Connected it back up, the SES light went away after one restart.
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