Question about 1995 Saab 900

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Surging engine revs.

My wife has a 95 900s and we`ve had it for a few years now and can`t find a mechanic who can find a problem. the problem is when at idle on occassion the car will rev so hard it sounds like it`s going to explode then all of a sudden the rpm`s drop and the car stalls!

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Try cleaning out your throttle body with some throttle body cleaner. good luck

Posted on Feb 19, 2009

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Check if your idle control valve is working. if it is stuck open randomly it will definetly have the symptoms you describe. this valve controls idle by allowing air to bypass the throttle body the more open the valve the higher th idle. other sensors such as coolant temp sensor, throttle position sensor and air flow sensors all play a part in sending the computer info so the computer can send a signal to the idle control valve. so check all sensors and connections. hope this helps. p.s. the idle control valve is right next to the throttle body/cable

Posted on Aug 14, 2008

There is a recall on the engine computer for this problem

Posted on Aug 09, 2008

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