I have a 2004 Pontiac Bonneville GXP with 116k on it. runs pretty good has small quirks tho. recently it started dying at idle. at cold start RPM goes way up then engine dies. HELP??

Asked by Mar 24, 2015 at 10:01 AM about the 2004 Pontiac Bonneville GXP

Question type: Maintenance & Repair

has Northstar V8.

5 Answers

78,065

Check the codes, it could be an ISC starting to fail.

1 out of 1 people think this is helpful.

What is an ISC?

78,065

Idle speed control, have the codes checked to see if this comes up in memory.

1 out of 1 people think this is helpful.

thank you!! I was also told to clean carbon build up in throttle body. Would that be a quick fix?

had codes checked today..nothing. car ran fine so I bought some throttle body cleaner as a precaution. Was told it might be a fuel pump. any ideas??

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