Question about 1996 GMC Jimmy

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1996 gmc jimmy 4.3 very hard to start hot or cold

Have checked fuel psi when key is first turned on it goes to 55psi but drops to 0 with in 15 to 30 seconds after engine is off has no codes in computer fuel psi hold at 50-52 when it is running

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It sounds like you have a pin hole in the hose that goes to the fuel pump in the gas tank. The pump is mounted on springs and it is common for the plastic hose to get a hole rubbed in it from one of the springs. This usually cause the vehicle to be real hard to get started when it is cold.

Posted on May 18, 2009


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