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Thread: AC Clutch Engaugement

  1. #1
    Senior Member blsnelling's Avatar
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    Sep 2010
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    Default AC Clutch Engaugement

    Howdy all. It's been a while since I've posted. The truck is still running great. I've got an issue with my AC clutch engaugement. When I turn on the AC the clutch doesn't engauge like it should. It'll hit and kick out immediately. If I rev it just a few RPMs it stays engauged. My freon pressures are correct and it cools nicely. It just won't stay engauged at idle. My idle speeds in B4603 are higher than stock. The only AC related differences I could find over stock where in G0108 and G0109, which I don't think would affect it. I don't see anything that says "don't enable AC clutch belowe xxx RPM". Any ideas?
    '01 ECSB 4x4, '04 6.0L LQ4 Shortblock, 243 Heads Milled .035 11:1 Compression, Pac 1218 Springs, Yank PT3200 Stall, Comp Cam 220/224, .581/.581, 112LSA, LS7 Lifters, TBSS Intake Manifold, Edelbrock 3864 90mm T-Body, Doug Thorley LT Tri-Y ceramic headers, Flowmaster 50 SUV, LS1 e-fans, Airaid MIT, Complete valve body build up, 4.30:1 Gears, 33/12.50-17 Tires

  2. #2
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    Default

    Hi blsnelling,

    Log the pid STATE00 to see if it offers any clues.

  3. #3
    Lifetime Member Chevy366's Avatar
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    Sometimes if timing is to low at idle it will cycle the clutch when engaging , pulls to much timing and causes the PCM to cycle clutch , something to look at .
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

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