Fuel issue

Discussion in '94-95 5.0 - Specific' started by jwhisl, Mar 10, 2015.

  1. jwhisl

    jwhisl Active Member

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    Hey guys I know it's been a while since I've posted around here. I'm in the process of moving back to Oklahoma and I'm bringing the 94 convertible with me. I'm still having the issue with the car not starting . I pulled a CCRM out of a salvaged mustang and I still have the issue. I'm debating whether or not to order a new ccrm and ecu from the parts store. Last I tested I only had 9V getting to the pump. The car used to start with ether but I dont want to do that too many times. I need suggestions please.
     
  2. jwhisl

    jwhisl Active Member

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    Forgot to mention I have a J4J1 ecu and harness.
     
  3. kb1982

    kb1982 Active Member

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    I would check the power and see what it is entering the inertia switch, and then out of it.
     
  4. toyman

    toyman Active Member

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    Remove and clean the battery to engine and engine to chassis ground terminals. You should see 12+ volts to the fuel pump.
     
  5. 5PNTSLO

    5PNTSLO New Member

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    Fuel pump relay diagnostics: First, always check the inertia switch in the trunk and the fuel pump fuse in the underhood fuse box (20 amps). Also check the ignition switch fuses. With the key turned to run and checking within the fuel pump prime-out period (a duration of 2-5 seconds after turning the key to run): Check CCRM pin 5 for accessory 12 volts. If you have it, the issue lies downstream. If not: Check CCRM Pin 11 for constant 12 volts. Check CCRM Pin 13 for accessory 12 volts. Check CCRM Pin 18 for a ground signal during the prime-out.
    If this is all good, check the inertia switch (located in the driver side trunk, adjacent the tail light) and fuel pump electrical connector at the tank.
     
  6. 5PNTSLO

    5PNTSLO New Member

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  7. jwhisl

    jwhisl Active Member

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    Thanks guys for the info! Im loading the car up to head back to oklahoma monday so I will check all of the pins when I get back to Tulsa. Ive checked the fuses and all is good there, I need to check the wires leading into the ccrm. Thanks!