electrical problems

Discussion in 'Technical' started by chase259, Aug 31, 2014.

  1. chase259

    chase259 Member

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    Okay so here is my back story, the car was running fine then it started to not start everytime I stopped and then it started to cut out if I didn't keep my revs up, so I found out it was the battery cables and alternator I replaced both and now all it does is turn over (perfectly and with enough power) but it won't fire, the negative cable is grounded to the motor, so my question is if it's not grounded to the frame will it cause this? Or is it something else because she ran fine for so long so I think it's electrical not mechanical
     
  2. Bryant

    Bryant forgot more than learned

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    its something else.
    did you replace the starter solenoid? if so their are 2 small post on the front of the solenoid. one is marked S and the other I. the post has the wire that comes from the switch and triggers the solenoid. the I post has a wire that goes to the coil and provided full battery voltage to the coil during cranking. if this wire is not hooked up then that could cause it not to start.
    Could you have missed one of the wires that goes to the hot post on the solenoid?
     
  3. chase259

    chase259 Member

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    I did replace it and everything is hooked up the way it was before
     
  4. Bryant

    Bryant forgot more than learned

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    check to see if you have spark while cranking. easy way is to take the coil wire off the distributor and lay it on something metal with about 1/4 to 1/2" gap between the contact end of the wire and the metal. spark should jump the gap when cranking.
     
  5. Bryant

    Bryant forgot more than learned

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    also what year of car and engine do you have?
     
  6. chase259

    chase259 Member

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    Okay it started right up when I just tried it but then I went to turn the car off and it just kept running...
     
  7. chase259

    chase259 Member

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    1971 car with a 1974 302
     
  8. rthomas771

    rthomas771 Member

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    Sounds like either a bad starter solenoid or ignition switch.
     
  9. chase259

    chase259 Member

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    The starter solenoid is brand new
     
  10. chase259

    chase259 Member

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    Also the oil light stays on all the time until I start it
     
  11. Bryant

    Bryant forgot more than learned

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    its supposed to.
    sounds like the ignition switch in the steerig column is acting up
     
  12. rthomas771

    rthomas771 Member

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    Does the oil light stay on when your car keys are in you pocket or when the key is turned in the run position? If you disconnect the wire going to the oil pressure sending unit the light will stay on with the engine running.
    The solenoid that I replace a month or two ago was only 4 months old. When I first bought my Maverick I went through 2 new fuel pumps in 2 months. The 3rd fuel pump is 6 years old.
     
  13. chase259

    chase259 Member

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    Haha sorry I know it's suppose to but I mean when the key is out and the tumbler is in the off position
     
  14. 74LDO

    74LDO Member

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    do you have a body ground ? ford grounded on the fender right by the battery and on the engine
     
  15. chase259

    chase259 Member

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    Would that cause this problem?
     

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