Dreaded MISFIRE!!!

Discussion in 'Engine & Performance' started by Venomized, Oct 11, 2012.

  1. Venomized

    Venomized Full Access Member

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    After a few different searches Im thinking my issue is clogged cats. Im going to pick up a couple maggy uni hi flows and have the muffler shop here weld everything up so it clears out that issue.
     
  2. iowaredneck

    iowaredneck Administrator

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    Sure hope that fixes it

    sent from my galaxys3 while you iphone users wait in line for the new (old) technology
     
  3. Venomized

    Venomized Full Access Member

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    me too. I really wanna drive it and get to work on the other things I want to do to it haha. Especially with winter coming up, i want to be able to utilize the 4WD
     
  4. Venomized

    Venomized Full Access Member

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    Well after injectors swap, TB cleaning, TB elbow cleaning and IACV cleaning along with seafoam it seems to be running a lot better. Its still a tad sluggish on acceleration but Im hoping after a trans filter/fluid change it will take care of that.
     
  5. DestinationFX4

    DestinationFX4 Admanistrator

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    have you changed your plugs/wires?
     
  6. Venomized

    Venomized Full Access Member

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    Yes twice lol.
     
  7. iowaredneck

    iowaredneck Administrator

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    Try swapping out the pcv valve for the acceleration. I did the other day and what a difference. Its a whopping $4 @ autozone

    sent from area 51
     
  8. Venomized

    Venomized Full Access Member

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    Will do red thanks!
     
  9. iowaredneck

    iowaredneck Administrator

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    Yes sir

    sent from area 51
     
  10. Venomized

    Venomized Full Access Member

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    Long story short, I had a misfire issue and after replacing the plugs and wires and injectors and cleaning the TB and EGR I still had a bit of an issue. Using the carb cleaner spray check method I figured out my intake manifold gaskets were bad. Upon removing the intake this morning I found I had been chasing the wrong cylinder all along. The manifold gasket was bad at the #1 cylinder when I was thinking it was the #4 or #7.

    Also I want to apologize to f150 owners abroad for even driving this thing. I took the t stat housing off and the coolant that came out looked like coca cola :censored::censored: So Im glad Im going through and replacing all fluids after this escapade.

    On to the pics:
    intake seperated
    [​IMG]
    intake valley. see the broken plastic pieces from the lower intake shield
    [​IMG]
    Heres each side of the gasket
    [​IMG]
    [​IMG]
     

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