Question about GMC G1500

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93' gmc 1500 4x4, i changed the cap and rotor, i might have gotten a plug wire in the wrong spot. do you know the pattern they are suppose to go? also i just found out i have a hole somewere on top of the gas tank, when im at about 60-65mph, it chugges, can that hole cause something like that to happen?

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  • chr_pearson4 Sep 23, 2009

    thanks i did have two that were wrong. now the next wuestion is i dont know the correct name of it, but on the top if looking at the motor top left side, there is a 90 degree plastic piece that comes out with a hose, does that go to the hose that is on the bottom center of the carb?

  • chr_pearson4 Sep 23, 2009

    then i have a brake issue, on the resivor the back always seems to go down fast, i have no sign of brake fluid on any of the wheel wells, they are completely dry. any clue as to were the fluid is going? my inlaw has an old grain truck that he was having the same problem, his was going under the floor board. could it be going there? its dry there as well. any suggestions? thanks chris

  • chr_pearson4 Sep 23, 2009

    with replacing the cap and rotor, will that help me with getting better then 7mpg? or you think it could be a timing issue?

  • chr_pearson4 Sep 23, 2009

    does changing the rotor and cap, will that help me get more then 7mpg? i changed the plugs and wires already and just did the cap and rotor today, or you think it could be a timing issue?

  • chr_pearson4 Sep 23, 2009

    what do you mean by setting it to 7mpg? and how do i leave feedback for you?

    thanks chris

  • chr_pearson4 Sep 23, 2009

    thank you!! very helpful



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Yes changing the rotor and cap will help.this will set to 7mpg .but the wires and connections needs to be properly connected.if the timing belt is loose or worn out the problem may be there.but if timing belt is proper then replacing the rotor and cap will help.
this will help.thanks.please do rate the solution.thank you for using fixya.keep updated.

Posted on Sep 23, 2009

  • charlymonty Sep 23, 2009

    by setting i mean it will solve the problem to get more then 7mpg in your vehicle.replacing the rotor and cap will help.
    thanks.keep updated.

  • charlymonty Sep 23, 2009

    just send your comments here i will easily receie it and reply.


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Here is the the firing order diagrams for both a V-8 and V-6 for your vehicle.
Having a hole on the top of your gas tank is not a good thing. My '88 Corvette wouldn't start because I had not properly replaced the fuel cap after gassing up one afternoon, it was due to the fact that the back pressure that is created by sealing the tank with the gas cap was not created, I had a similar problem with my wife's Villager.
93' gmc 1500 4x4, i - 299e828.jpg

Posted on Sep 23, 2009


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I replaced the spark plugs, gaped at .35, replaced wiring, took each wire and replaced from the one I replace so the firing order should be correct, replaced the cap and rotor. The had been running before...

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