Rep Power: 289

man, I dunno what is gonna happen, but it's never a good sign when you're idle speed drops while you're stopped at a light in an automatic. sitting there, minding my own business in D, with the idle around 650-700 or so, when it drops suddenly to the 500 and lower mark and starts to sputter. I push it into neutral and rev it to 2k for a little and the light changes and I wait for it to drop and shift then. doesn't happen again at all. this is the first time it's ever done that. I code scanned the car and nothing came up, and I've been keeping an eye on her. something tells me its a matter of time until something gives now. I'm thinking either alternator (cuz my lights are dimming more than usual when I do stuff) , or my belt is slipping. any other ideas for me to check on?

 
Rep Power: 812

just pull off the throttle body and clean the iac sensor. see all nice and clean after spraying a can of carb cleaner in there and getting all the carbon out.

 
Rep Power: 289

I'll probably do that this coming friday when my shop lets me work on my car.
we got some strong-assed throttle body cleaner from I think midwest (yellow can) like a case of it is like 90 bux or something only 6 cans though....

 
Rep Power: 289

well I gotsa update. don't quote me on the readings but I load tested the batt and then the alternator. the battery is fine. the car was started and we had the alternator hooked up, we put a load to it, and it moved maybe 1-3 amps from 40. sooooooooo i guess I'm going to be replacing the alternator. and in that pic Gearbox, what is that pic of? I can't tell because of the angle ...but I opened the butterfly valve and sprayed down in there, it was clean btw, for the most part, if the metal under the butterfly is a gun metal like color....

 
Rep Power: 812

Its the IAC valve on the left of the throttle body. those two holes with the 3 on it is for the coolant hoses. that valve is usually covered with carbon and can get stuck, causing erratic idle.