Question about 1997 GMC Jimmy

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97 jimmy runs good until motor gets warm , then bogs down and backfires tried new fuel pump , coil convertors checked crank sensor, computor ,mass air flow and fuel filter help

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  • nuggetmustan Jul 23, 2008

    runs good til motor is warm than bogs out. if you cycle the key it run good for like another min then bogs out. New fuel pump, filter, distribitor, ignition switch, coil and wires.

  • Anonymous Mar 26, 2014

    i checked the fuel filter and was not clogged but the only way i can start it is by unhooking the air filter where the air flows to the intake



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Check your coolant temp sensor resistance cold and warm, the colder the more resistance

Posted on Jan 14, 2009

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Have you replaced your O2 sensor? If not, try that.

Posted on Jul 09, 2008


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1992 D15 honda civic after warm stalls out and won't start back up!!!

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If there is spark, check if the fuel pump gets hot and shuts down. Check fuel pressure or check if you have gas up to the engine.

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try checking the fuel pump. most fuel pumps have a filter on them in the tank if they get dirty or plugged it could cause the car to act up.

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MAF Sensor and 02 Sensor

Replace the fuel pump with another one.
This is a common issue.
Don't use an "aftermarket" pump; buy one from Chevy.
I just had this exact same issue in my shop. The truck would run for a bit, and then just stop. I had the truck towed in, and the fuel pressure was good. Drove it for a while, with the gauge hooked up and taped to the windshield, I could see the fuel pressure start to drop off. I told the owner that she needed a new fuel pump.
The owner told me that the pump was 2 months old. I went ahead and changed it anyway. A new fuel pump cured the problem.

Testing the MAF and the O2s is not going to tell you anything. A failure, an open or a short would set the check engine light.
Please feel free to get back to me if you desire any further input. Thanks for choosing FixYa for assistance.

Jan 25, 2009 | 1999 GMC Jimmy

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