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My 98 super charged EX

Discussion in 'Elite Explorer Registry' started by 4pointslow, July 1, 2008.

^^Searches ExplorerForum.com^^





  1. CDW6212R

    CDW6212R Hauls the mail. Elite Explorer

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    Excellent work, I figured you had that all possible.

    Given all the checks, the piston issue or similar wild things are viable thoughts. Mine would be wiring, given the age, brittleness, I'd think about checking continuity of items like the coil wiring, injector wires etc.
     
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  3. boominXplorer

    boominXplorer Elite Ranger Elite Explorer

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    Small head gasket leak? Notice any coolant loss?
     
  4. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    I normally love engine performance diagnostics but the temperatures just dropped so it's racing season.
    Cant go racing with a broken truck though! LOL
    Another video being posted very soon, uploading now....
     
  5. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    No coolant loss.
    Also no blow by out breather hose when disconnected, actually had a small vacuum from the PCV system like it should.
     
  6. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    I had a lab scope hooked up to the ignition coil primary circuits, and the fuel injector circuits looking at current and voltage.
    Nothing noticeable there.
     
  7. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    Here are the latest test results.

     
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  8. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    The latest test results are in!

     
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  9. MrQ

    MrQ Fuel Pump Replacer Elite Explorer Moderator Emeritus

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    That power balance test looks exactly like what I saw on my friends WDS, except mine was on the V8. I did everything you did, changed injectors, checked for vacuum leaks, replaced all the intake gaskets, even switched over to a return-less fuel system. Nada. So I thought its a problem in the head. Tore it down week before last, everything was beautiful so I did a TDC on cylinder 8 and found I had bent the rod, not too badly, but enough for it to be really down on power and have a vibration.

    What was weird is it passed a relative compression test, but the power balance said there was something wrong. Granted you are doing an actual compression test which is better indicator than a relative.

    Not saying its your issue, but I feel I should point it out since my results were similar.
     
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  10. 4pointslow

    4pointslow Explorer Torture Tester Elite Explorer

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    Thanks MrQ,
    I am thinking it is going to turn out to be something very similar.
    A nitrous backfire could bend a rod or crack a piston etc.
    I am planning to smoke test the exhaust system to check for false O2 readings on that bank, if nothing shows up I will probably start pulling the motor.
    Either way I am having fun with all the diagnostic tests and trying to film/document them.
     
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