motor chugging

Discussion in '4.0 Engine' started by greenmachine2000, Dec 21, 2012.

  1. greenmachine2000

    greenmachine2000 New Member

    have a 2000 4.0 that has a
    rough croppy idle almost like a
    miss after start it goes
    away after a drive.
    things that are new and
    changed -plugs autolite plats
    -wiring autolite pro series
    -ignition coil
    -fuel filter
    -it has had a seafoam
    treatment -motor has been pressure
    tested and no issues so now im out of!
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  3. SalRanger2

    SalRanger2 Ranger Lover

    vaccuum leak maybe?
  4. mcdonald58

    mcdonald58 New Member

    How do you check for a vacuum leak?
  5. SalRanger2

    SalRanger2 Ranger Lover

    spray some carb cleaner around the vacuum lines and intake manifold. if the idle changes when you squirt an area thats where the leak is
  6. ZRanger28

    ZRanger28 Got boost?

    have you cleaned the idle air control valve recently?

    how much oil do you lose between changes?

    do you lose any coolant?

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