Mustang problems, mustang forums wont help.

Discussion in 'Other Automotive Tech & Talk' started by justin has a 74, Oct 5, 2010.

  1. justin has a 74

    justin has a 74 Maverick bandit official

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    89 mustang 2.3 auto

    Driving home the other day and i got the car a little hot (around 230, i forgot to turn my fan on[​IMG])

    When the car was hot it started to shut down and would drop about a thousand rpms and then go back to normal. It did this about 5 times before i picked up pizza. I Then went to my friends house bla bla bla and then left. I got about 100 yards down the road and it had the feeling like it was backfiring but it wasn't. It was going onoffonoffonoff until it died about 10 seconds later. Got a tow home and got to working on it. Fuel pump isnt kicking on and no spark. I bypassed the saftey switch in the back and nothing happened. Replaced the relay and nothing. For the spark i replaced the Ignition modual and now im getting power to the coil but no spark out of the coil[​IMG] So i switched coils and got the same results.

    Ignition modual replaced
    Fuel pump relay replaced
    eec relay replaced
    And im about 85 bucks into this and dont want to waist anymore money. I should have just brought it to a shop but now im kind of stuck.

    Any input please?


    Im about to change the whole computer:mad:
     
  2. 74 GRABBER

    74 GRABBER Member

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    Any Codes?
     
  3. justin has a 74

    justin has a 74 Maverick bandit official

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    Whats this codes stuff? Im only guessing ill have to get a reader from advance auto but i cant find a plug for this car under the dash.
     
  4. maverick75

    maverick75 Gotta Love Mavs!

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    Last edited: Oct 5, 2010
  5. facelessnumber

    facelessnumber Drew Pittman

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    Shoulda spent some of that on a thermostatic fan controller. :outtahere:
     
  6. 74 GRABBER

    74 GRABBER Member

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  7. justin has a 74

    justin has a 74 Maverick bandit official

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    This is going to use brain power....
     
  8. mercgt73

    mercgt73 Member

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    did you smack the black box on the passenger strut tower and try to start it? I had to replace that on my wife's car after it left her sit once. I forget the name of it, but it has non-serviceable relays in it.

    Forgot to add: She has a 1993 2.3L convertible.
     
    Last edited: Oct 5, 2010
  9. justin has a 74

    justin has a 74 Maverick bandit official

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    DOnt see any black box on the passanger side. I now hear the eec relay click but not the fuel one....

    Test isnt working. The dang light isnt blinking eather with the cheapo test light or the check light itself

    Chasing mice!!!
     
  10. mercgt73

    mercgt73 Member

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  11. justin has a 74

    justin has a 74 Maverick bandit official

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    Yeh mines under the drivers side seat lol
     
  12. Bryant

    Bryant forgot more than learned

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    i cant think of how overheating would damage the eletrical systems. the only thing that i can think of is you lost the engine grounds. i dont know much about the 2.3 mustangs but the 5.0s had a ground on the back of a cylinder head. the over heating may have created some carosion in the ground connection. a loss of computer ground can keep it from going into diagnostic mode.
     
  13. justin has a 74

    justin has a 74 Maverick bandit official

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    yeh yeh yeh, ill give that a checking tomorrow.
     
  14. justin has a 74

    justin has a 74 Maverick bandit official

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    Power to fuel pump relay and eec relay. No power to inersa switch or however you spell it.
     
    Last edited: Oct 6, 2010
  15. my70mav

    my70mav Member

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    checkout my5oh.com they helped me out a ton with my 91 mustang
     

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