1990 Oldsmobile Ninety Eight Logo
Posted on Apr 27, 2009
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Paired cylinders missing after restart

My 1990 olds 88, 3.8v6 runs great. Usually if I start and drive it runs fine, but if I stop and then restart 2 cylinders won't work. Before now it would clear up but lately it is getting worse. The cylinders that misfire are the pair fired by the top portion of the coil. About 6 months ago the ignition module was leaking goo so I replaced it, which helped but then I replaced the coil and it was running fine until recently. The plugs are good and I replaced the wires, no improvement. In the last few days it has started to miss even if I don't stop and restart. The module seems extrememly hot, but it is essentially mounted to the head. Could it be overheating?

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  • Master 4,669 Answers
  • Posted on Apr 28, 2009
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Do you have access to an ohm meter?

  • Anonymous Apr 28, 2009

    Resistance check the coil. The top two, the middle two, and the bottom two should be the same resistance between the plug wire towers

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