Question about 2000 Buick Park Avenue

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Have a 2000 buick park ave. after changing plugs and wires check engine light still on. computer code says misfiring number 5. What part needs changing? Im thinking the coil?

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Yes start with the coil pak. There are three located on the front of the engine on the pass side, you probably know this. They are marked as to which cylinder each wire goes to, disconnect the wire for #5 cylinder, and if the engine misfire does NOT change, it is more than likely that Coil Pak. Replace it, and use dilectric grease on the two contacts when reinstalling it. Now, I have stumbled on this issue many times and if that does not cure the issue (I think it will), the coil module below the coil pack is probably bad...To remove this module, remove the coil paks, the electrical connector in front (has bolt holding it in) and I remember one bolt holding the module to the aluminum bracket.

Again, to be sure you can switch coil paks around to make sure it is a coil pak. When you switch the bad with a good, the misfire will follow the coil pak, if it does not it is the module.]

Hope this helps.

Posted on Oct 04, 2010

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