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I have a 99 Pontiac sunfire. It wouldn''t stat for

Sent to Car Experts January 26 05:07 PM

I have a 99 Pontiac sunfire. It wouldn''t stat for the last couple of weeks and I thought the fuel pump was out on it. Now that the weather has warmed up it starts but it surges up and down at idle . Could the Idle motor be bad or does the idle need to be reset?

 

Optional Information:
1999 Pontiac sunfire 2.2 L

Customer (name blocked for privacy)
Status:  Closed   Value: $15
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January 26 5:12 PM (5 minutes and 6 seconds later)
         
ACCEPTEDCheck Mark
Hi, Super mechanic here. There is a good chance that there may have been ice in the fuel line. It would be best of course to check the fuel pressure but if you are only having this problem at idle, then yes it could be the IAC valve. Of course, you want to check for any trouble codes. You may also be having an icing condition at the throttle body, even though it has warmed up some. I would first suggest that you do a throttle body cleaning on it and see how it will run. Let me know how it does, thanks

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