Thread: 97 Grand Prix Engine Randomly Cutting Out

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  1. #1 97 Grand Prix Engine Randomly Cutting Out 
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    I have a 97 Grand Prix GTP with 197,000 miles. For the past few days, the engine has been randomly and erratically cutting out under power and occasionally at idle. I am not losing electrical power, as the lights and all accessories remain on uninterrupted. The engine will just randomly cut out, the RPM will drop, and then it will kick back in. I may have had this problem once before (I have done a lot of work on this car over the years) and the crank shift position sensor sticks in mind (I may have done this about 3 years ago). Any ideas?
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  2. #2 Re: 97 Grand Prix Engine Randomly Cutting Out 
    I live here. Slick2500's Avatar
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    Crank Position Sensor is the first thing that comes to my mind. But it also kinda sounds like maybe the ignition control module.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  3. #3 Re: 97 Grand Prix Engine Randomly Cutting Out 
    Killa Bee Scottydoggs's Avatar
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    if the tach is dropping to zero then stalls, it sounds like the crank sensor again.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  4. #4 Re: 97 Grand Prix Engine Randomly Cutting Out 
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    Is the ignition control module the device that is in the column just behind the steering wheel? If so, I replaced that about 6 months ago.
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  5. #5 Re: 97 Grand Prix Engine Randomly Cutting Out 
    I live here. Slick2500's Avatar
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    No its the plate under the coils for the plugs.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  6. #6 Re: 97 Grand Prix Engine Randomly Cutting Out 
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    Is there a specific way to determine whether it is the CPS or the ignition control module?
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  7. #7 Re: 97 Grand Prix Engine Randomly Cutting Out 
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    Update: so the SES light came on (it does from time to time, usually with a mass air flow code because I have a K and N filter and it gunks up the sensor I guess sometimes). Well it was a mass air flow code again. So i just decided to clean the sensor for the heck of it. This seems to have done the trick so far. Car has not acted up since. We will see if this continues.
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