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  1. grimjeeper666

    Running Ruff No Power 4.0l ??

    Took it off and cleaned it with carb cleaner. I had this problem on my 93 YJ but can't remember what I did to fix it. I have 6 jeeps so I can borrow parts to figure out what's bad.
  2. grimjeeper666

    Running Ruff No Power 4.0l ??

    Washed the greasy 4.0l now it has a miss and hardly any power. Note I did check the distributor cap, it dry plus I washed it 2 days ago. Any ideas? Did clean the idle air control valve. Note also it will idle smooth until you rev it up.
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