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jumpy

  1. LB7 Rough Idle???

    01-04.5 LB7 Duramax Powertrain
    so the truck runs and drives just fine, but at an idle it jumps up about 200 rpm every 5-10 secconds. When I pump the top of the fuel filter, no more rough idle. put a brand new filter on thinking it could be that, no changes, pulled the bleeder valve screw and it was totally destroyed so i...
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