Question about 1995 GMC Yukon

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Running rough - hesitant

95 Yukon 2 door. 300,000 kms - so engine is a bit tired. vibrations while accelerating - really bad when going up a fairly steep hill starting at the bottom with a low speed. RPMs seem to stall for a split second and it feels like there may be a problem with the exhaust, but I've heard it could be a distributor problem. Taken it in twice, and mechanic can't seem to find it. otherwise running sound.

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  • daryn_reece Apr 14, 2009

    haven't done any towing since the problem started a month or so ago. it's just the vibrations that seem to come and go, and tend to be the worst when going through hard acceleration on an incline. The vibrations are also pretty bad when the gas is on lightly. I just noticed today that while going up a hill, when it seems to hesitate, that the RPM needle drops a bit, but only for a split second. water in the gas could be an idea, as it's as if it's not getting a clean intake of fuel.

  • Roberta Smith
    Roberta Smith May 11, 2010

    first thing i would suggest is to buy a couple bottles of gas line antifreeze and add them to your tank... (it sucks up any water in your fuel)... what i am wondering... does it make any odd noises during hard acceleration/loads ?

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You may also want to consider that the coil pack is failing... i remember when my windstar coilpack failed i had an awful time just getting up a small hill... can't recall if it shuddered tho.

Robert

Posted on Apr 14, 2009

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