Question about 1989 Ford Mustang

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1989 Mustang GT Keeps dying

I added a BBK Intake manifold, BBK Cold Air Intake, BBK Fuel Pressure Regulator, BBK Pulleys, MSD Ignition and a Hypertech chip. We have tried for 2 days with and without a timing light to get it to stop dying. The first day with the timing light we didn't have a chance to let the car warm up before we left the shop but it kept dying on the way home. The second day without the timing light we put the car on the freeway for about 20 minutes and when the car came close to 5mph it kept dying.

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  • antonm Jul 13, 2008

    The BBK Intake manifold came with a new throttle body too. So that shouldn't be the problem. No after market cam as of yet. The car has sat for the past 4 years. I just did a tune up yesterday, new E3 plugs, oil and the distributor is a brand new MSD one. No new plug wires but they lokk like their in good shape (ford racing).

  • antonm Jul 14, 2008

    I'll have that stuff done thanks for the info.

  • tx360gofast Aug 04, 2008

    i have 89 gt i have gt40 heads gt40 intake msd ignition and when i shft to secon gear the car make explotions and die he only do this on second gear

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Make sure the inside of your throttle body doesn't have a gunk build up. If so, clean in out with some carb. cleaner really well. If the crack is plugged up in the throttle body, air cannot get into the engine at idle in which the car will die. Are you running an aftermarket cam? If you are, drill a 5/32 hole in the center of the lower half of the throttle plate in the throttle body. This helps a great deal as well.

Posted on Jul 13, 2008

  • Lee Quiroz
    Lee Quiroz Jul 13, 2008

    Set your timiing at full advance around 34 degrees with the engine at 2500 so all the timing is in. Also try setting the idle by the set screw at the side of the throttle body.

  • Lee Quiroz
    Lee Quiroz Jul 13, 2008

    One more thing to try, remove your exhaust at the headers and see if it'll idle by itself then.

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be02898.jpg
Fuel Pressure RegulatorREMOVAL & INSTALLATION
(see Figure 1)
  1. Disconnect the negative battery cable.
  2. Relieve fuel system pressure.
  3. Disconnect the ignition coil.
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b91f3a9.jpg

Fig. 1: Exploded view of the pressure regulator assembly-MFI systems


To install:
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aaf5240.jpg
Fig. Fuel pressure regulator-4.2L engine
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