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225 loss of power/dies @ idle

Discussion in 'Early CJ-5 and CJ-6 Tech' started by Simi Valley CJ-5, Oct 26, 2010.

  1. Oct 26, 2010
    Simi Valley CJ-5

    Simi Valley CJ-5 New Member

    Simi Valley, CA
    Joined:
    Jul 8, 2008
    Messages:
    42
    Maybe someone can help me with a mysterious problem I'm having with my 225. The engine has an intermittent loss of power @ freeway speed (can't pull in overdrive). When I come off the freeway ramp and idle at a light, the engine losses rpm and dies. Here is the wierd part. The engine then will not start but issues a blue cloud of bad spelling smoke out of both side pipes. After a few minutes of sitting, the engine will crank w/o issuing the mysterious blue cloud of smoke, then starts with a thick black cloud as if it had been flooded out. I've replaced points, plugs, plug wires, distributor cap and fuel filter. I've had a carberator man open up the G2. He says everything looks ok. Has anyone had a similar experience?
     
  2. Oct 26, 2010
    cj6/442

    cj6/442 Sponsor Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
    Messages:
    2,686
    fuel pump?cracked rubber fuel line?
     
  3. Oct 26, 2010
    EricM

    EricM Active Member

    Southern California
    Joined:
    Dec 19, 2007
    Messages:
    1,020
    is the fuel cap vented?
     
  4. Oct 27, 2010
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,749
    I'm guessing timing/distributor/advance problem.
     
  5. Oct 27, 2010
    mikesgoat

    mikesgoat Member

    Fresno
    Joined:
    Jul 23, 2010
    Messages:
    82
    sometimes replacing the condenser will effect that
     
  6. Oct 28, 2010
    Simi Valley CJ-5

    Simi Valley CJ-5 New Member

    Simi Valley, CA
    Joined:
    Jul 8, 2008
    Messages:
    42
    Its the "blue cloud" while cranking which puzzles me. I've never seen anything like it before. Does a blue cloud always mean oil is being burned in the cylinders? If so, the logical cause must be oil fouling the plugs. But if that is the case, why aren't the plugs being fouled all of the time? Why does the vehicle start after a short cooling off period w/o the blue cloud being present? Also, How can oil foul both sides of the engine block at the same time? Is there a way for oil to get into the intake manifold such as a gasket which is just beginning to leak intermittently?
     
  7. Oct 30, 2010
    cerial

    cerial Banned

    Middleville MI
    Joined:
    Aug 11, 2010
    Messages:
    139
    Going to put my money on timing and/or your carburetor being out of adjustment. And that you have a bad valve(s).
    Couple others. Vacuum leak or pcv routed incorrectly. Electric Choke not working/sticking/closing at hot temps.

    Replace your plugs, degrease your engine, Check for intake leaks(starting fluid around the gasket), check your timing, disconnect your electric choke(if you have one)install a temp cable. Blow your vacuum lines checking for worn rubber. pull your air cleaner and run it.
     
  8. Nov 1, 2010
    Simi Valley CJ-5

    Simi Valley CJ-5 New Member

    Simi Valley, CA
    Joined:
    Jul 8, 2008
    Messages:
    42
    Well, I spent a couple of hours with the help of Mike from Conejo Carburator. The jeep "kermit" acted up for Mike who said he swore the ignition lacked spark at first, then mysteriously appeared again. I came to the conclusion that the culprit is the anti-theft system. This was put on by the P.O. It was about all that was left in the ignition system which I haven't replaced. Took the anti-theft off and Kermit ran with new spirit back to Simi (about 30 miles). Time will tell if the mystery is solved or not. Thanks for those who offered their help and opinions.:tea:
     

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