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  •  » 65 FB 5 liter conversion will not start

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    1/18/2021 11:52 AM  #1

    houckml@yahoo.com
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    Registered: 1/05/2021
    Posts: 2

    65 FB 5 liter conversion will not start

    65 FB 5 liter conversion will not start. Donor was 92 GT, project done 10 yrs ago. Has run well with only one problem due to bad coil connector on Scott-Drake harness. Recently parked in garage and a week or so later would not start. Ignition checked OK. Also noted that the fuel pump did not run when ignition turned on, but did run when a terminal shorted at the EEC connector. Instead of "stalling" the pump continued to run. Could hear fuel returning to tank. Suspected no fuel pressure. Changed pressure regulator on fuel rail. Still no fuel pressure. What am I missing?

     

    1/18/2021 12:48 PM  #2

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,458

    Re: 65 FB 5 liter conversion will not start

    How old is the TANK?!......Could be the filter/sock is clogged.
    Welcome to the best FoMoCo site on the web!! (we don't beat-you-up-for-dumb-questions....
    cause there ain't none!!
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    1/18/2021 1:20 PM  #3

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
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    Re: 65 FB 5 liter conversion will not start

    One:  are you sure the pump isn't running on start.  It will only run for about a second and a half to get pressure to the injectors if the PCM is right.  It has to sense RPM to turn the pump back on after start.

    Two:  I agree with Sal, make sure the pump is actually moving some fuel.

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    1/18/2021 1:26 PM  #4

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
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    Re: 65 FB 5 liter conversion will not start

    If the fuel pump isn't running with the switch on, maybe a bad contact in the ignition switch, this may also not be sending power to the ignition system. 
    Do you have spark?
    I'd invest in a fuel pressure gauge to verify the correct pressure you do have.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    1/18/2021 1:52 PM  #5

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
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    Re: 65 FB 5 liter conversion will not start

    BobE wrote:

    If the fuel pump isn't running with the switch on, maybe a bad contact in the ignition switch, this may also not be sending power to the ignition system. 
    Do you have spark?...(Got far?!!  one of the 3 things needed to achieve combustion!)
    I'd invest in a fuel pressure gauge to verify the correct pressure you do have.

     

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    1/18/2021 2:38 PM  #6

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: 65 FB 5 liter conversion will not start

    Just to be clear, it cranks, but does not start correct?

     

    1/18/2021 4:59 PM  #7

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,073

    Re: 65 FB 5 liter conversion will not start

    BobE wrote:

    If the fuel pump isn't running with the switch on, maybe a bad contact in the ignition switch, this may also not be sending power to the ignition system. 
    Do you have spark?
    I'd invest in a fuel pressure gauge to verify the correct pressure you do have.

    X2 on this.
     

     

    1/18/2021 5:34 PM  #8

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,048

    Re: 65 FB 5 liter conversion will not start

    When you place jumper at diagnostic connector, fuel pump will run continuously until removed.
    If fuel pump runs, that circuit is ok.  Just need to verify pressure builds up at fuel rail.

    Can you pull codes?

    Last edited by Nos681 (1/18/2021 5:36 PM)

     

    2/01/2021 10:48 AM  #9

    houckml@yahoo.com
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    Registered: 1/05/2021
    Posts: 2

    Re: 65 FB 5 liter conversion will not start

    Turns out it was the ECM. Started right up when replaced.

       •Thread Starter
     

    2/01/2021 11:03 AM  #10

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
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    Re: 65 FB 5 liter conversion will not start

    Being back on the road is a good thing!

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    2/01/2021 11:26 AM  #11

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,458

    Re: 65 FB 5 liter conversion will not start

    'preciate you coming back on to report the good newz!!
    Com'on back now, ya he're!!
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    2/01/2021 1:31 PM  #12

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
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    Re: 65 FB 5 liter conversion will not start

    houckml@yahoo.com wrote:

    Turns out it was the ECM. Started right up when replaced.

    You must be Lance's Daddy-in-law.  That is a very nice car you have there.  Glad you guys got it going again.

    BB1
     

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

     

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