my 2002 run good, but at a stop light the rpms go surge from 600 to 1200, bach and forth. put it in neutral and it idles right. any ideas?

Asked by Aug 03, 2014 at 08:36 PM about the 2002 Pontiac Sunfire

Question type: Maintenance & Repair

2 Answers

72,045

Check for vacume leak,s at or around intake,and if engine light is on could be bad tps.

335

check engine/service engine soon or other dash lights. Spray some carb cleaner or starting fluid around your vacuum lines and listen for the idle to change this will help you find a leaking vac. line. (try to do this while the engine is cold & have a fire extinguisher handy just in case!).

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