Question about Buick Regal

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I have a 1997 Buick Regal LS my wifes car she says when she is driving down the road the car will lose power and then it comes right back it also sometimes will not start. The check engine light comes on every once in a while then goes off. I did check the fuel system and if there has spark. When I drive the car it seems to run great and always starts. So the last time the light came on a friend has a diagnostic computor and we hooked it up and it showed a code P0300 crankshaft position sensor A, I alway thought that if the sensor was bad that the car would not run is this true or BS, If it is the sensor how hard is to change or should it be done by a professional. Thanks for the help Mike C.

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P0300 is a random misfire code not a Crank Sensor Code. Alot of cars don't rely on the crank sensor for fuel and ignition timing but simply to check misfires. However, some cars do need the crank signal to stay running. It's possible that the sensor has an intermittent short or open in it and the car is dying when the signal is lost. If i remember correctly the crank sensor on a 3.8 is behind the harmonic balancer. So that would require removing the drive belt and balancer to get to it. Not a real challenging procedure but it will likely require the use of a harmonic balancer puller.

Posted on Oct 04, 2009

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My car did the exact same thing. It would die while driving. And then sometimes once I turned the car off, it wouldn't start back up for a while. The check engine light would occasionally come on and off. So when it did come on, and the car was running, I took it to get the trouble codes. It said that it was the crank sensor. It's a very common problem for GM cars. Once you replace that, you should have solved your problem. It did mine.

Posted on Oct 11, 2009

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