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Q: Runs well but stalls after a while on 1993 Oldsmobile Cutlass Ciera

When driving without stop for about 45 minute car stalls. It will start up immediately after the stall but when put into gear it stalls again. This starting and stalling continues on until I just let it sit for about 10 minutes and after the sit, when I start it and put it into gear, it acts normal and doesn't stall when I put it into gear. I can then drive it normally for about another 45 minutes and then the stall happens again and I have to let it sit for another 10 minutes before I can drive normally again until after another 45 minutes goes by etc... Does anyone know what the cause of this is or have they ever had the same problem? Have put in new plugs wires and coils. Engine light is not on and it runs like a new car before the stalling starts. No problems starting the car when it stalls.
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What really has to happen is a test needs to be performed when failure is occurring. Then you can see if you are missing a good spark or good fuel pressure. You could have an air intake problem that is intermittent as well, such as the idle control valve that meters air into the intake.
thank you Dave for your quick response. I'm going to check out the air intake first thing in the morning. Hope I can ask you this question too? Where is the crank sensor located on the engine of my car. Thanks in advance if you have this answer.
I think one of my colleagues answered that question in another post - it should be at or near the crankshaft pulley.
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