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ignition coil

  1. Second replaced coil pack in one month

    OEM Issues
    About a month ago we got a check engine light and very rough idle. The code indicated misfire on cylinder 4. I replaced the spark plugs and cleaned the throttle body, but that didn't help at all. I then replaced coil pack # 4 and it worked fine. I cleared the code and it didn't come back. A few...
  2. Cylinder #5 Ignition Coil Bolt

    General
    As I was replacing the coil pack on cylinder #5, my worst nightmare happened....the bolt broke. The space is too small for me to get a drill and extractor into. I was thinking of just RTVing or gluing the coil pack down and calling it good. Any thoughts? Ideas? Appreciate the insight! Chris
  3. 2005 Trailblazer Ignition / Electrical Issues

    General
    Hello all... New guy here with what I'm hoping are not major 2005 Trailblazer (4WD) issues. Background on problems: Approximately 2 weeks ago we had several days of subfreezing temps here in Louisiana. The 2005 Trailblazer had not been run during this period and had sat idle for +/- 10 days...
  4. Broken Ignition Coil Bolt

    General
    Does anybody have any experience or advice on how to remove a broken ignition coil bolt (cylinder 6). It snapped while I was installing the new coil. Is the bolt required for grounding? If not, could I just place some gasket sealant around the flange of the coil and call it a day?
  5. engine knocking, misfires, rattling rocker arms, oh my

    OEM Issues
    It started with my 05 TB turning on the check engine light. I checked the code, and it mentioned something about the knock sensor going off. I checked around and decided to replace the spark plugs in the truck. When that was done, I though everything was fine, except coil pack 4 and 6 didn't...
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