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Thread: 94 mustang gt

  1. #1
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    Default 94 mustang gt

    My buddy just installed a 70mm throttle body on his 94 gt. he followed the instructions to a T and everything got assembled properly but now the car is not performing right. It stalls out in low rpm or when he puts it in reverse. It's an automatic.
    Any suggestions?

  2. #2
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    Default Re: 94 mustang gt

    Sounds like a possible vacuum leak...look at all the hoses and connections. Make sure they are hooked up and not split.

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  3. #3
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    Default Re: 94 mustang gt

    The mechanic used a smoke machine and found no leaks in any hoses for vacuum lines. Is it possible that the 70mm is just too much for the stock upper intake?... Could it be a fuel to air ratio problem??
    Any suggestions?

  4. #4
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    Default Re: 94 mustang gt

    If there are no vacuum leaks, contact the vendor and maybe they can help. I am not a Mustang guru but there are some on here. Maybe somebody else will chime in.

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  5. #5
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    Default Re: 94 mustang gt

    Did you do a computer reset?
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  6. #6
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    Default Re: 94 mustang gt

    He didn't screw up the tps or iac did he?
    - I break things -
    '70 Mach-1 "money pit"

  7. #7
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    Default Re: 94 mustang gt

    The only reset we tried was unplugging the battery for period time which usually resets the computer. I talked to him recently and he said the stalling has stopped and the performance feels better. But the check engine light is still on and the shifting on the auto trans feels different. I think he needs a tuner but he doesn't want to spend 300$ unless he knows its the problem for sure.
    thanks for all your input btw. Keep it coming

  8. #8
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    Default Re: 94 mustang gt

    The sn95 is picky, but it's not that picky. Changing your tb should not throw a cel.
    Is he still running all the egr stuff?
    And again, check into the tps and iac.
    - I break things -
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  9. #9
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    Default Re: 94 mustang gt

    what siwel said. the sn95 is a picky bastard with mods. first make sure the idle air control is not screwed up, thats what it sounds like to me.

  10. #10
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    Default Re: 94 mustang gt

    I would guess the iac too.



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  11. #11
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    Default Re: 94 mustang gt

    The iac will cause all kinds of nightmares and if I'm thinking correctly it is mounted in the throttle body. When its removed it needs for lack of better words re-programmed but not through the elm. There is a mechanical process to it

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  12. #12
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    Default Re: 94 mustang gt

    Quote Originally Posted by LOWCOP View Post
    The iac will cause all kinds of nightmares and if I'm thinking correctly it is mounted in the throttle body. When its removed it needs for lack of better words re-programmed but not through the elm. There is a mechanical process to it

    Sent from my PC36100 using Tapatalk 2
    Same with the tps, they're both mounted to it.
    - I break things -
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  13. #13
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    Default Re: 94 mustang gt

    yea amazingly i forgot about it being mounted there too. been a long day

  14. #14
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    Default Re: 94 mustang gt

    You have to elongate the holes on the tps to make it "adjustable"
    - I break things -
    '70 Mach-1 "money pit"

  15. #15
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    Default Re: 94 mustang gt

    I did that on my 2k car

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  16. #16
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    Default Re: 94 mustang gt

    is the tps set correctly
    JPrice

  17. #17
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    Default Re: 94 mustang gt

    ^^^ what these guys are saying. A 70mm throttle body will not significantly alter the A/F ratio, nor should it need a retune. Like they have said, the 94/95 EEC-V is a picky bastard; but IMO this sound like the TPS or IAC is just out of whack.
    Massey
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