Engine Mechanical problem
2000 Saab 9-3 repair Question 4 cyl Front Wheel Drive Automatic 146,00 miles
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I just had the direct ignition coil replaced for the third time and also repleced the mass air flow meter/sensor? The car starts o.k when cold and then won't resart after it's heated up. Also putters. stalls and won't start again (until it cools off 1/2 hr +) when you come to a stop when driving it for a while. check engine light is not on..

Check the crank sensor, some get heat ssensitive and give the wrong value output, or no output. The same can be said for the Engine coolant temp sensor(ECT).