Question about 1996 GMC Jimmy

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1995 Gmc Jimmy Starting Problem

I have a 1995 GMC Jimmt 165k miles. It will only start with ether or if I prime the motor (pump the accelerator several times bfore starting). Also, cannot crank or it will not start has to be short bursts on the starter. Is there a sensor or accelerator pump that should be running at startup?

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  • lucas4927 Jun 22, 2009

    I replaced the fuel pump. I had 50-55psi on but would drop to 40 when cranking. Bought a fuel pump, 1.5 hrs later, it is running perfectly.

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If the engine is using a carburetor, the top gasket maybe leaking evaporating the fuel in the bowl. Check or replace the solenoid switch on the starter body.

Posted on Jun 01, 2009

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I have a 1995 GMC Jimmy that won't start.


It sounds like a faulty fuel pressure regulator. When you turn the key to the on position the fuel pump starts for an instant to build pressure in the fuel line. If the pressure regulator has allowed too much leakage since the last start then the fuel pump does not have enough time to prime the line. The fuel pressure will still measure ok when the car is running because the leakage is very low. Try turning the key off and on a few times prior to starting and see if the extra pump priming steps help. Also check the vacuum line to the regulator because it needs vacuum to work correctly.

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1 Answer

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