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Thread: Need help figuring out a drivability problem......

  1. #1
    Junior Member
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    Need help figuring out a drivability problem......

    Recently i did a head, cam intake swap on my car. Along with HCI my car has a Vortech, and 36lb injectors. Since i put the injectors in the car runs really bad at idle and when cold. Also it has been popping through the intake. Timing is dead on, only thing i can get from it is that the injectors are too much and it is causing the car to pop. I pulled number 5 spark plug and the electrode was normal but around the base of the injectors it had alot of carbon. It has a matching pro-m Maf, fuel pressure is set at 38psi, and no FMUAny help will be greatly appreciated. Heres a couple pics of number 5 plug:

    2000 Expedition
    1993 Hatch FOR SALE

  2. #2
    Senior Member fazm's Avatar
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    i dont think the injectors are too much, but id definately pull them and get them flow tested to make sure they are each flowing the same amount. ive seen brand new injectors be off from each other.
    2005 v6 redfire mustang. yup its slow.
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    12.11 @ 122.0 best mph

  3. #3
    Administrator BurnTire's Avatar
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    When I had a blower on my old Fox a slight air leak between the MAF and blower intake caused they same type of problem. Check all the easy stuff first.
    Sold
    2004 Cobra, Whipple ,TH-400
    Burning Corn
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  4. #4
    Super Moderator Gene's Avatar
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    Quote Originally Posted by BurnTire View Post
    When I had a blower on my old Fox a slight air leak between the MAF and blower intake caused they same type of problem. Check all the easy stuff first.
    +1

  5. #5
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    Come to find out it was a combination of a bad EGR valve and a bad MAF.


    Bill
    2000 Expedition
    1993 Hatch FOR SALE

  6. #6
    Member svo8u's Avatar
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    Sorry didn't realize i posted all this under the wife's login. As stated above i got it fixed for now.
    85 Mustang SVO 4cyl turbo Sold
    93 Mustang Hatch

  7. #7
    Administrator BurnTire's Avatar
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    Quote Originally Posted by svo8u View Post
    Sorry didn't realize i posted all this under the wife's login. As stated above i got it fixed for now.
    Cool time to go burn some tire!
    Sold
    2004 Cobra, Whipple ,TH-400
    Burning Corn
    9.97 - 135.5

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