Question about 1988 Buick LeSabre

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I have a miss in the engine 3.8 l, i put a new coil pack and new spark plugs and wires and still have a miss

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  • Jeff Turcotte
    Jeff Turcotte Sep 07, 2010

    is the check engine light on? Do you know which cylinder is missing? Have you done a compression test on the cylinders?

  • meadjames Sep 07, 2010

    no the check engine light is not on and i think its the middle cylinder in the back thats missing

  • Jeff Turcotte
    Jeff Turcotte Sep 07, 2010

    OK, I recommend you do a compression test on that cylinder (and maybe a couple more for comparison). Some parts stores (autozone, advance) will loan you a tester. You can even do it right at the store. Take the plug out, screw the tester in, remove the coil wire from the dist, and crank the car for a couple revolutions. If the pressure is less than 125 psi, you have a burned valve or blown head gasket.

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  • Master
  • 3,113 Answers

Always replace wires and plugs at the same time to prevent carbon tracking . Check for vacuum leaks, look at the plastic tee at the end of vac. hose going to cruise servo for leaks.on firewall.

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SOURCE: Missing in every gear..

you have to see if the coil pack fire up do you have spark coming out of the coil pack cylinder 2 never mind the other code the missing cylinder make the other sensor malfonction check if you have spark coming out of the coil pack if not change the coil pack if you have you spark check the compression let me know pierre please dont rate right away we work together to fix our problem because i whant you to get our car running good and i whant a fixya anything else is bad for me thanks pierre

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