Need Help With Mustang Just Dieing .

Discussion in 'Fox 5.0 Mustang Tech' started by h mabry, Apr 24, 2014.

  1. You have to click on the pushpin with the right mouse.
  2. Does this car have emmissions related items still intact?
  3. this is what the car does have,
    trickflow powder colted street heat 75 mm intake upper and lower..
    C/L 76mm mass air
    BBK full BBK 70mm Throttle Body w/70 mm EGR Spacer...
    BBK Cold Air Intake ...
    BBK full length 1 3/4 CNC ported Silver Ceramic headers
    24 pds injectors
    Trick Flow Twisted Wedge® 185 heads that are CNC ported to 215
    1.72 rollor rockers
    E-303 cam
    ARP bolts
    C/L 76mm mass air
    flexkool Aluminum Radiator
    Flex-a-lite 398 fan
    MSD 6AL Digital Ignition Module
    msd Blaster HVC,coil
    msd Distributor cap
    msd 8.5 wires
    NGK Performance Spark Plugs
    SCT eliminator chip
    Steeda Tri-Ax short throw shifter
    double hook quadrant
    southside lower lift bars
    double adjustable upper control arms
    255 i fuel pump
    flo masters 2.560 pipe H
    Steeda Drag Springs
    BBK Camber plates
    Sub Frame Connectors
    wheels.. cobra 17s
    tires.. 235 45 r 17s
    moser axles
    3.73 postive trac
    5 speed Transmission
    Centerforce Dual Friction Clutch & pressure plate
    70-30 Lakewood Drag Struts
    kyb rear shocks
    m/t 26x8.5-15
  4. That 'splains a few codes. Grab a new ect sensor for one
  5. got one and the air one too on the lower intake
  6. Do any of the electrical accessories (radio, wipers, A/C& heat fan present intermittent operation?
    Yes - replace the ignition switch
    Recall on Ford Ignition switches:

    Some of the symptoms of ignition switch problems are things that don’t work or are intermittent like radio, turn signals, wipers or heater.

    There was a FREE recall on Ford ignition switches. They overheat and sometimes catch fire. That burns up the steering column and sometimes the car interior. Since this is very old information, you may not be able to get the switch replaced for free anymore. The auto parts stores sell the switches for $13-$15.




    Saleen0679 was nice enough to dig this up for us awhile back: Replace a 1979-1993 Ignition Switch Assembly

    No, there aren't any flaky things going on with the radio, wipers or A/C & heater fan
    Bypass the MSD (May Suddenly Die) box.

    MSD wiring:


    Instead of using the battery negative terminal, attach the heavy gauge black wire to the body ground point by the windshield washer filler.

    The battery common ground is a 10 gauge pigtail with the computer ground attached to it.
    Picture courtesy timewarped1972
  7. no and the switch is new also
  8. i have bought everything new that i could think of,, that has any thing to do with it..
  9. does anyone have any ideas ???
  10. Is this like the guru crew or something? @mikestang63 I'm flattered you corralled me in with everyone you listed I feel honored
  11. We all make mistakes ;) I'm sure it was just a typo on his end. Lol

    @h mabry I can see mikes picture just fine. ??
  12. Damn I hope terrible things happen to your bowels in the next few hours @84Ttop
    84Ttop likes this.
  13. i had a subuaru once (ya i know but the wife and car seats were happy)

    very same problem.. it would be what the heck power just cliff dropped, bucked and would die or recover.....

    easy to restart it...

    turns out it was one of the ignition wires, in fact the factory had to get involved and they issued a tech bulletin because of our car :)

    point being jrichker's idea would have tracked down our same scenario...
  14. okay i will go though them again , i got schematic 's diagrams for everything i think..
  15. Maybe check your vacuum. Had my car randomly die because the pcv doesn't fit tight in the lower grommet.

    Something loose allowing a lot of vacuum out suddenly can cause that to happen. It causes a major drop in fuel pressure.