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LT1 fast xfi & xim ls7 coils no start

Discussion in 'EFI Tuning Questions and Engine Management' started by 9secondz28, Aug 18, 2012.

  1. 9secondz28

    Joined:
    Oct 11, 2011
    LT1 fast xfi & xim ls7 coils no start

    hey everyone i have had issues forever now and cant get the car running.
    everything seems to be right and coils are firing but wont turn over just burps and pops!

    1994 lt1 397 stroker
    fast xfi 2.02
    fast xim
    fast 4x crank trigger set at 50 deg. btdc
    new ls7 coils (no heat sink version)
    a/c delco optispark converted for cam sync only!

    i use a timing light while cranking and im getting roughly 25 deg. btdc and thats right where xfi is telling it to be so its right.
    made sure every coil is firing and it is and all the wiring is correct to each coil from harness.
    my dip switches are correct (00001101).
    harness is wired and looped for discrete sensor.
    both xfi and xim are communicating and are getting cam and crank signal.
    i have a data log from today while cranking im attaching!!

    here is a link with some pics and video of the leds on the xfi and xim.


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    Attached Files:

    9secondz28, Aug 18, 2012
    #1

  2. TurboNova

    Joined:
    Jun 18, 2004
    Re: LT1 fast xfi & xim ls7 coils no start

    answered on the CPGNation forum.
     
    TurboNova, Aug 20, 2012
    #2

  3. 9secondz28

    Joined:
    Oct 11, 2011
    Re: LT1 fast xfi & xim ls7 coils no start

    **update** to finish the thread

    car is running!! the cam sync was out 180deg. so instead of pulling the opti off i repinned the coils at the harness and now instead of the xim going abcdefgh its now efghabcd just running bank to bank right now ill hve to repin the injector harness to run sequental which ill do this weekend...
     
    9secondz28, Aug 29, 2012
    #3

  4. lazaris

    Joined:
    Jul 2, 2008
    Re: LT1 fast xfi & xim ls7 coils no start

    Great to hear you really struggled with that. At least your persistence paid off. :2thumbs:
     
    lazaris, Aug 29, 2012
    #4

  5. vwdave

    Joined:
    Sep 3, 2006
    Re: LT1 fast xfi & xim ls7 coils no start

    We got away from distributors and people are still getting them 180 out. :p

    GJ though fixing it.
     
    vwdave, Sep 3, 2012
    #5
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