sbc hei distributor
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  1. #1
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    sbc hei distributor

    help have rebuilt my engine ran fine now wont start only firers now and agen have power to dissy changed diss newone still no go

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  3. #2
    TechnicalTom
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    Because you mention HEI , I will start there , just one + wire would run this distributor the 2 nd. wire is for the Tach.Try running a temporary live wire from the battery , On the HEI I have in my hand right now ,there 5 Wires in total so 3 wires( red yellow and Black) are into the dist via the plug .so they are not easy to get wrong , the the pair of terminals go to the car , one to the Tach and the other to the ignition switch sometimes via an ballast resistor .Also is there any possibility an earth wire from the engine to chassis/battery is not as it was before you rebuilt? Maybe the problem is with the fuel system.
    Last edited by TECHNICALTOM; 18-02-2012 at 18:52.

  4. #3
    I'm Not Jed Clampett stueeee's Avatar
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    Did the motor have an HEI on it before? when you changed the dizzy did you also change the cap? if you didn't, it could have a faulty coil.

    If it had a points dizzy before check whether you have a ballast resistor in circuit, The feed to the HEI batt connection needs to be 12V with no ballast resistor in circuit on all the ones I have seen.
    Stuart.
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  6. #4
    Official RnS Addict rodster's Avatar
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    is it carbed or fuel injection a bit more info would go a long way, av you checked for spark or is it fuel related

  7. #5
    TechnicalTom
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    http://www.msdignition.com/pdf/WDTN_pn9615.pdf . Here is a link to a great source of information regarding distributors ,And as the above poster recommended , lots more detail s of your project would help us help you .
    And Stueee you are absolutely correct , no balast resistor with HEI , my bad .

  8. #6
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    hi the problem started with missfire on two or three pots then nothing replaced modul still no spark so got a uprated hei from the us still no go this a new one conplet ?

  9. #7
    Rods 'n' Sods Junkie doorslammerpop's Avatar
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    Don't discount the obvious, you need to make sure that you are getting a good live feed to your dizzy, one way to make sure would be to run a live wire strait from the live on the battery to the terminal marked ing on the hei . If it fires then the live feed is the problem but if there is no spark then i would investigate further at least one problem has been eliminated. If it stated with a missfire it could be the coil breaking down or even just a dodgey live feed, don't forget that engines generate a lot of heat which sooner or later effects wiring and connections.

  10. #8
    1972 Formula 350 owner Marc's Avatar
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    Maybe a needle blockage in the carb??

  11. #9
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    thanks to all the inputs gone back to points as heis were crap am trying to get some cash or replacement for the new one i got frome the usa as its crap and it was a new uprated one thanks to you all chris

  12. #10
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    thanks to all the inputs gone back to points as heis were crap am trying to get some cash or replacement for the new one i got frome the usa as its crap and it was a new uprated one thanks to you all chris

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