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plugs

  1. I4/I5 Engine & Drivetrain
    My 2004 colorado 5 cyl needs new plugs and with 175K and the codes I got on a long trip, also know the coils need to be replaced as well. While I'm at it, will replace the value cover too as I'm getting some leakage into the coil/plug wells. Gasket set is no biggie. However there are various...
  2. Engines/Performance/Tech Questions
    Happy Thanksgiving Everyone, having said that,I have started to have a surge issue with my 04 Colorado 5cyl. It bucks slightly at freeway speed, but seems to be fine at idle. I just changed the plugs, but being an older guy with other problems, I don't remember if it was doing this before the...
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