Smog Pump Removal Questions

Discussion in '94-95 5.0 - Specific' started by Craiger77, Mar 19, 2014.

  1. Craiger77

    Craiger77 New Member

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    I am in the process of restoring a 95 Cobra and after reading this post I discovered that the previous owner removed the rear crossover tube to the back of the heads and it doesn't appear they plugged the holes.
    The smog pump was still on the car but in modified form.

    I'm not sure why they did this but it's now gone. I've decided to remove the pump as I am not concerned about emissions.

    What are the effects of having not plugged these ports on the back of the heads?
    I'm chasing numerous gremlins and I need to eliminate factors. Any help would be appreciated.
     
  2. lutter94

    lutter94 Well-Known Member

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    Emissions, what is emissions. Where do you live?
     
  3. CC'S95GT

    CC'S95GT Legend

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    It would be an exhaust leak. those holes need plugged.
     
  4. boss302whr

    boss302whr New Member

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    The car still runs???


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  5. Craiger77

    Craiger77 New Member

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    Yes, it runs but not very well. It had a miss. It also would hesitate and pop when given throttle when cold. I was trying to chase down vacuum leaks when I learned it was missing the crossover tube. I'm not as familiar with the 5.0 as I am the 4.6 so it's a learning process.


    So I noticed the tube was missing and assumed I had an uncovered smog hole at the rear of the head as people on here suggested in other posts. Well, I couldn't find any vent holes? The bolt holes are there, but no vent. It didn't make since that my cobra was different than all of yours. Then I realized that I'm assuming that my genuine vin coded cobra had its factory engine. What if the motor (or at least the heads) are replacements?


    Sure enough, I check the stamp codes on the heads and it appears I have gt40p's sitting on the motor. I have the cobra intake, valve covers, even the springs and 1.7 rockers but the heads are P heads.


    I still in the process of determining how far this goes. I'm wondering now if the short block and heads are both replacements and if everything else was swapped over? Who knows what cam it may have. Maybe that's why it's wasn't running just right?


    I also have a steeda driveshaft spacer at the end of my drive shaft and I'm not sure why it was used.
     
  6. CC'S95GT

    CC'S95GT Legend

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    Are you even sure it's a real cobra.
     
  7. Addermk2

    Addermk2 Well-Known Member

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    Probably have a tremec tko variant, or a foxbody T5.

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  8. Craiger77

    Craiger77 New Member

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    It's a VIN coded real cobra. All other cobra parts are present.
     
  9. Addermk2

    Addermk2 Well-Known Member

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    Except the heads. And probably the trans.

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  10. Kylebach14

    Kylebach14 New Member

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    You need to plug those ASAP they sell a bolt kit on jegs
     
  11. Craiger77

    Craiger77 New Member

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    I'm not sure I even have them. The car is in the process of being torn down so it's not running for a while anyways.

    The casting stamp on the tranny says the following.

    13-52-066-919

    The internet says I have the following based on that casting:
    85-90 Ford World Class w/plastic vent tube (also on some 84 NON-WC)

    I wish I could have spotted some of this stuff when I bought it. I would have beat the price down further. Lol.
     
  12. boss302whr

    boss302whr New Member

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    I thought cobras came stock for gt40p heads?


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  13. boss302whr

    boss302whr New Member

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    With gt40 heads


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  14. lutter94

    lutter94 Well-Known Member

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    cobra's were gt40, explorers were gt40p
     
  15. boss302whr

    boss302whr New Member

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    Ah ok


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  16. Addermk2

    Addermk2 Well-Known Member

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    Actually...

    96 and early 97 explorers came with regular GT40 heads. Not GT40Ps.

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  17. lutter94

    lutter94 Well-Known Member

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    ok, where did the p's come from? I swore thats what I've read over and over......sorry for the misinformation.
     
  18. Addermk2

    Addermk2 Well-Known Member

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    97.5-01 explorers.

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  19. Dugzy33

    Dugzy33 Member

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    Uhm. Pretty sure they don't have the crossover tube.
    Or the holes in the heads.
    Different smog set up.
    My gt 40s don't and when I was at the wrecking yard looking at the gt 40 p's on an explorer I didn't see them.