******* wont start
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  1. #1
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    ******* wont start

    Ok so i got a big Chev, roller cam and Ls6 (pop up) pistons. Msd style billet dizzy, magnetic trigger (not crank) and a 6al msd. Ok so the ******* wont start. No points so i reasoned that if i hook up my snapon timming light to number 1 with the plugs out and grounded i can at least time it at zero at tdc. All the plugs fire. So if i give 10 degrees advance and put the plugs in, and wind it over, zippo. Even the timing light refuses to fire. So what do you think? leads braking down or a bad earth. I should point out it's a race car and i dont run a generator. Also it all worked fine six years ago. The major change being the new dizzy in place of the old Mallory duel point and a re wire.
    Help ta.

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    richard rawlplug Torment's Avatar
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    king lead ??? if all the plugs refuse to fire could it be a dodgy connection...???


    The Oddlot Drag Racing Team...havin fun is usual
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    your not drunk enough if you can lie on the floor without holding on..

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    Official RnS Addict bigjob's Avatar
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    Ive had duff modules in two MSD dizzies over the years,Bry
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    Thanks guys, really need help, this kept me away from Hrds. Remade the ends on the main feed from the batttery. Could be the Msd, had them fail before. Have spare 6al's + 7al.
    This year is running out fast and i need to make some noise.

  7. #5
    Official RnS Addict LUCKY777's Avatar
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    crank trigger wire ?
    visit us at www.luckydevil777dragracing.com "life isnt an audition"

  8. #6
    richard rawlplug Torment's Avatar
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    if you need crew brin.......


    The Oddlot Drag Racing Team...havin fun is usual
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    your not drunk enough if you can lie on the floor without holding on..

  9. #7
    Official RnS Addict chucks41's Avatar
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    Had a problem similar to this on my son's Dodge (no spark at plugs) Took nearly a week to diagnose coz of other problems aswell. Has MSD digital 6 fitted. Removed King lead and followed troubleshooting guide shorting magnetic trigger leads, still no spark from coil. Checked gap between magnetic pickup and reluctor wheel in distributor found it was too large, should be less than 8thou (actually set to ~16thou).
    Altered it & fired second attempt been fine since.
    You've probably checked it but might be worth another look
    Chucks
    Too much time on my hands. Too little money in my pocket

  10. #8
    Rods 'n' Sods Junkie bluedan68's Avatar
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    Quote Originally Posted by chucks41 View Post
    Had a problem similar to this on my son's Dodge (no spark at plugs) Took nearly a week to diagnose coz of other problems aswell. Has MSD digital 6 fitted. Removed King lead and followed troubleshooting guide shorting magnetic trigger leads, still no spark from coil. Checked gap between magnetic pickup and reluctor wheel in distributor found it was too large, should be less than 8thou (actually set to ~16thou).
    Altered it & fired second attempt been fine since.
    You've probably checked it but might be worth another look
    Chucks
    Funny that i had a problem with a msd in a 351w and went through all the steps on msd website and they gave a value to which to set the pick up and relucter wheel. after finding it was the pick up it's self bought a new one from real steel and the fitting instructions gave me a smaller value to set it too?

    I'm here coz it's a cool place to be

  11. #9
    Official RnS Addict mikeyboy's Avatar
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    Is MSD made in China now too?
    There's no replacement for displacement.

  12. #10
    My name is Martin 30psi's Avatar
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    I'd run a seperate power source/earth to the MSD from another 12V battery to eliminate potential bad earths or power drops.
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