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  1. I4/I5 Engine & Drivetrain
    I have a 04 Z71 Colorado 5 cyl, and have a fluctuation of the RPM at about 60 MPH, even with the cruise on.I have replaced the coil packs,plugs,cleaned the Maff sensor with the Maff sensor cleaner, checked /cleaned the air filter, checked for vacuum leaks( Only 2 places?) I have ordered...
  2. Engines/Performance/Tech Questions
    Hello All, Again, I'd like to express my sincere thanks for suggestions and comments pertaining to my earlier gaffe, the details of which can be found here. That would be the thread where yours truly torqued off the bolt heads holding the water pump to the engine. Good job, Johnny. Moving...
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