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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
    So I thought I had finally fixed my issues with the warning lights coming on but come to find out I had been diagnosing them incorrectly. The nice thing is the problem is very repeatable. While driving, or sitting in the driveway with the transmission in neutral, If I punch the gas and run the...
  3. Electrical/Lighting/Security
    k well i have the 12 volt wire hooked up and the ground wire. BUT i have know clue were iam supposed to hook up the actual wire that reads the rpm i dont really care about the light source one. it says some stuff about the negative ingition coil and some other spark plug stuff. i want to install...
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