Question about 2000 Pontiac Sunfire

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2000 sunfire, 2.2 litre, automatic tran., rough idle on startup for about 3 to 4 minutes till the temp gauge reads about 50 C. After that runs great for the whole day.

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One thing you might do is remove air hose to throttle body and see if it how dirty it is and if so clean real well and also run some injection cleaner through the system. I would try this first.

Posted on Sep 05, 2009

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There is a short list of problems that can cause that.

Maintenance: spark plugs, plug wires, air filter, fuel filter.

mass airflow sensor could be dirty.

heater in the oxygen sensor could be failing


Try basic maintenance first. Any questions please reply back.

Posted on Sep 05, 2009

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