COLD CRANK CAR HAS A ROUGH IDLE

2003 Infiniti I35

Tiny

Anonymous

October, 17, 2012 AT 5:01 PM

Cold crank car has a rough idle. The car doesn't have its smooth idle in the morning anymore. Taken to shop, but they seem to can't find the problem.

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1 Answer

Tiny

KHLow2008

October, 17, 2012 AT 10:00 PM

If the cold start rpm is low it could be due to various reasons.
Do you have coolant losses or overheating issues?
Are there any trouble codes?
After warming up, what is the idling speed and does it change when A/C is turned on?
Are there any performance and driveability issues?

Try cleaning the IAC and throttle body for a start.

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