2002 Pontiac Sunfire Q&A

2002 Pontiac Sunfire Question: surging when idles

I have a 2002 pontiac sunfire that when it idles it surges we have replaced the altinator and the spark plugs also the idle sensor, What else could the problem be? -
Answer 1
Low coolant level, bad coolant temp switch, or a vacuum leak are common causes of surging idle but proper diagnostic tests need to be done to determine whats wrong. -
Answer 2
ineed an answer -