Question about 1995 GMC Jimmy

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I have a 1995 GMC jimmy. I was driving down the highway yesterday and all of a sudden I heard a poping noise and lost all acceleration. I press the gas pedal and nothing happens. Late last week I noticed I was not getting as much power as I normaly do. Any suggestions to what it could be ?

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This sounds like a fuel pump to me. its common on gm cars/trucks for these to go at some point. the popping was most likely either detonation (knock) or backfire from a much to lean fuel mixture combusting in your engine. when you turn the key to the first click you should hear the pump power up for two to four seconds, this is the pump getting pressure in the fuel lines. if there is no sound, your pump is fried. they run around $250 at autozone to buy, but idk how mechanically inclined you are to do it yourself. it involves dropping the tank since the pump is inside the tank. i hope this helps, and good luck!

Posted on Apr 28, 2010

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