dukmahsik

it happens SOMETIMES only, at all times of day/night, warm or cold, it only happens sometimes. I can't figure out any regularity to it. Only happens when car is at complete stop and revvs drop down to like 400rpms then bounce back up. Car has never stalled. Dealer said that it could because of fuel I am using (I call BS)... I use chevron 91 octane.

anyone else?

mrsteve

iTrader: (1)

Intake air control valve is dirty, clogged, or broken. Take it to the dealership and tell them to inspect it.

rtatsutani

Yep, I had the same thing. I did a full maintenance and carbon flush and that did the trick.

mclarenf3387

Its happened to a lot of us. It does it randomly, and with no regularity or pattern. No one seems to know what causes it.

cltphantom

probably just need to clean out your engine (i.e. check the air filter, TB, etc)

dukmahsik

thanks everyong... and cltphantom i love your avy! halo humping!

rlpierce04

Could be a bad sensor. Mine had a bad sensor and I was getting irregular idle readings ,but I could make it happen. Turned out to be a bad sensor.

quicksilver10101

mine was doing the same thing and now my check engine light is on and its worse. the rpms drop even when im sitting idle. the code reads heater sensory unit whatever taht it..i have an apt at the dealer in a week