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  1. Cyl 6 misfire/ coil pack problem

    OEM Issues
    I have searched and havent been able to find a solution. I have been dealing with a cyl 6 misfire that I have not been able to solve. A while back i changed spark plugs and the cyl 6 spark had a bit of rust but hadnt been misfiring at that point. This morning a felt ambitious and went under the...
  2. Oil on plug thread?

    OEM Issues
    Hey everyone! I've been stalking this forum for about a month now since buying a 2004 Trailblazer LS. There is a TON of awesome info on just about anything I need, and even a bunch of videos. I used several of these resources to change my spark plugs and clean the throttle body at about 91,500...
  3. [SOLVED] Rough idle after spark plug change

    OEM Issues
    Hi everybody! This is my first post, so I hope I threw this in the right place. So I know there are already plenty of threads regarding this sort of thing... I changed my spark plugs, I used AC Delco 41-103 plugs, I made sure they were all gapped around .042, I used dielectric grease, I made...
  4. Broken spark plug ... HELP!!!

    Hi all ~ I did the unthinkable ... while changing the plugs on the 4.2L engine on my 06 Envoy, the #2 plug broke in half with the threads remaining in the engine. I'm not a mechanic by trade so changing oil and plugs are the only thing that I would even attempt on my own. This is the first time...
  5. Change plugs & wires when doing headers?

    Exhaust Mods
    I'm at 60k miles right now and I plan to install Stainless Works Headers and true duals this fall. I watched this video on youtube because I'm seeing how difficult it's going to be to install the headers. In the video they mentioned installing...
  6. Good bye spark plugs...hello lasers?

    Everything Off-Topic Looks like someone has been busy over at the University of Liverpool. In fact they figured why use several lasers, when just one could be used to do it all. It's a bit of a read, but worth it and interesting. You case...