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Thread: 1991 mustang gt problem

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  1. #1
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    1991 mustang gt problem

    car will fire right up in morning an run great but as soon as u shut it off it wont start you gotta hold it to the floor to fire back up but sometimes it wont start at all? i changed collant temp sensor,module on distributor,new plugs wires cap rotor button but still no better also it got a bout 38 psi fuel pressure any suggestions what to do next!

  2. #2
    Almost Done Black87GT's Avatar
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    i didnt see new dist. on that list of things, my guess is the pip pickup in the dist. Ive heard its a real bitch to do, so the easiest thing is to get a new dist. (or used that is good)
    Fox/n.
    1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).

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    forgot to mention changed distriutor too i thought of that too

  4. #4
    Pinks All Out #189 349Stroker's Avatar
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    the problem with the car is it is too rich at startup

    did you change the temp sensor in the coolant crossover pipe?
    88 GT...and some boost

  5. #5
    Senior Member White5.0's Avatar
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    TFI module??
    2013 Mustang GT
    1987 Mustang GT
    1999 Contour SVT

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    no i didnt change the one in crossover pipe i will try that

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    changed module gonna try crossover collant temp sensor

  8. #8
    Senior Member Rodeheaver's's Avatar
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    Quote Originally Posted by chuck94 View Post
    changed module gonna try crossover collant temp sensor
    yes, the one in the intake is for the guage, the one in the cross over pipe is for the ecu..
    2015 A6 Mustang GT that so far has gone 9.48@147 but still the fastest prochargerd S550 in the world aside from Tim Essick's!
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  9. #9
    Pinks All Out #189 349Stroker's Avatar
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    yea the sensor in the intake is for the gauge

    I had the same problem as you and it was the sensor in the pipe.I actually had the wrong plug on it and switched the plug back and worked fine
    88 GT...and some boost

  10. #10
    Senior Member 95DropTop's Avatar
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    I read that this symptom could be caused by an ECT (Engine Coolant Temp) sensor.
    03 Cobra redfire vert - 466 rwhp / 456 rwtq

    Mods: Bassani Mid Length Headers, X Pipe and Cat Back, Accufab Big Oval Throttle Body And Polished Inlet Plenium, 2.95 Reichard Ultra Grip Pulley, MotoBlue Auxiliary Idler Pulley Kit, LFP Double Pass Heat Exchanger, K&N FIPK, C&L intake Pipe, 3.73 Gears, MGW Shifter, Spec stage 2 clutch, Fidanza aluminum flywheel, MotoBlue Hard Launch Bar, Full Tilt Boogie Racing kit and H&R Race springs

  11. #11
    Pinks All Out #189 349Stroker's Avatar
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    Quote Originally Posted by 95DropTop View Post
    I read that this symptom could be caused by an ECT (Engine Coolant Temp) sensor.

    that is the one I told him to change
    88 GT...and some boost

  12. #12
    Senior Member 95DropTop's Avatar
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    Quote Originally Posted by 349Stroker View Post
    that is the one I told him to change
    Yeah, I didn't read your post carefully enough. Sorry.
    03 Cobra redfire vert - 466 rwhp / 456 rwtq

    Mods: Bassani Mid Length Headers, X Pipe and Cat Back, Accufab Big Oval Throttle Body And Polished Inlet Plenium, 2.95 Reichard Ultra Grip Pulley, MotoBlue Auxiliary Idler Pulley Kit, LFP Double Pass Heat Exchanger, K&N FIPK, C&L intake Pipe, 3.73 Gears, MGW Shifter, Spec stage 2 clutch, Fidanza aluminum flywheel, MotoBlue Hard Launch Bar, Full Tilt Boogie Racing kit and H&R Race springs

  13. #13
    Pinks All Out #189 349Stroker's Avatar
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    Quote Originally Posted by 95DropTop View Post
    Yeah, I didn't read your post carefully enough. Sorry.

    np.alot of people confuse the 2 and don't realize the one in the intake is for the gauge
    88 GT...and some boost

  14. #14
    Senior Member mustang50lx's Avatar
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    A couple other things it could be EEC relay, fuel pump relay. When it won't start does it have spark and or fuel pressure?

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