When its cold out the car doesnt want to idle. We have to keep revving at stops. on 2001 BMW 330i

I think its taking on air but from where and how much does it cost to fix?

by in Atascadero, CA on November 17, 2012
2 answers 2 comments
ANSWER by , November 17, 2012
check for codes
ANSWER by , November 17, 2012
Is the check engine light on? Does it start and run normal until it's warmed up?
COMMENT by , November 18, 2012
Check engine light is on. The car runs fine when its warm OUTSIDE!
COMMENT by , November 18, 2012
Have the CHECK ENGINE light DIAGNOSED. Don't put parts on because of a code. Have the cause of the code determined. Possibly faulty coolant temp sensor or problem in that CIRCUIT (wiring , connection(s) or low coolant) , or several other possibilities.Parts places SELL PARTS they don't diagnose---just my opinion...Good luck.