Tuning Demon carb.

Discussion in 'Technical' started by Jamie Miles, May 19, 2007.

  1. greasemonkey

    greasemonkey Burnin corn

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    Be sure you have a good engine ground also.
     
  2. Hawkco

    Hawkco Genuine Car Nut

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    Paul, you make perfect sense, but we had three carbs on that car. The coil makes more sense. Would that burn two petronix modules? I know everytime Jamie put the tach wire on his coil, he got sparks.
     
  3. dkstuck

    dkstuck Member

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    I did read but forget. Is the tach hooked up? that may be the problem. Good Luck.
     
  4. Hawkco

    Hawkco Genuine Car Nut

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    We did and didn't. I believe when he left my house it was not connected. That is his starting point.

    The bad part of Jamie tracing down an electical problem is that he did not wire the car and it is no longer factory wiring. I'm sure it's something simple and it will take days to find - Murphy's Law.
     
  5. dkstuck

    dkstuck Member

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    Been awhile since I did the pertronics, is it suppose to have the resistor still hooked up? May want to "field rewire" a ignition system per pertronics to help elimnate problems. Keep us posted, lots of good info here.
     
  6. Max Power

    Max Power Vintage Ford Mafia

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    When was the last time any of you saw floats sink in 20 miles? It almost never happens.

    In that short of a time frame, if he is flooding out, I would guess debris keeping the needle from seating.

    Petronix I can run off the resisted wire, Pertronix II needs 12v.
     
  7. PaulS

    PaulS Member extrordiare

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    Yeah, with three different carbs it is doubtful that all of them had bad floats. I am not familiar enough the pertronics system to know what to ask.
    Are you using a resistor or the Ford resistor wire to the Pertronics unit?
    Have you had any other distributors on it? Do you have a points style distributor that you could try? Do you have a different coil to put on or a way to test the coil you have? (I have a coil tester but that won't do you any good)
     
  8. ford84stepside

    ford84stepside Lone Wolf

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    Years ago my Father in Law had a few British cars with Lucas electronics on them that always gave electrical problems. The shop he used called Lucas " The Prince of Darkness" because they always left you in the dark stranded somewhere! :rofl2:

    One thought came to mind on the carbs overfilling with fuel......are you running a manual or electric fuel pump? And if electric, do you have a regulator? I bought a Honda Civic to use as a work car one time that had an aftermarket electric pump installed on it. The guy I got it from said the electric was cheaper, $30 vs $65 for a correct manual pump [73 model Civic with a carb]. It would do the same thing, load up the carb and overpower the float and needle valve. Went to the proper manual pump and the problem was solved. If it is electric, maybe you need to put a adjustable regulator on it.
     
  9. Jamie Miles

    Jamie Miles the road warrior

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    None of the Fiat's original wireing is left. The car was totally rewired, one wire at a time. There is no Ford wiring in the car either, but it does use a Ford voltage regulator and starter solenoid, which are both mounted under the dash. I am not running Pertronix in the car right now and don't plan to again. The ignition system is a Duraspark II distributor connected to a Chevrolet HEI ignition module and an MSD Blaster coil.

    I think the problem is the coil. I drove the car around quite a bit today and it started acting up the exact same way it was the other night, with my original parts back on it... I am going to clean all the grounds and replace the coil with a TFI coil tonight.
     
  10. Jamie Miles

    Jamie Miles the road warrior

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    Well, I found the problem. There is water in the gas. :rolleyes:

    I went and filled the car up today with 93 octane ($$$ ouch...) and dumped a can of that water remover in it. The more I drive it, the better it's getting.
     
    Last edited: May 25, 2007
  11. Hawkco

    Hawkco Genuine Car Nut

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    How does water in the gas burn up a Petronix?
     

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