installing Petronix question

Discussion in 'Street/strip 400/430/455' started by magic marouke, Sep 4, 2018.

  1. CJay

    CJay Supercar owner Staff Member

    Your going to have to time it. The timing will change a little with the Pertronix install. Your car may benefit from some more initial advance.
     
    magic marouke likes this.
  2. Matt Knutson

    Matt Knutson Well-Known Member

    Don't be afraid to pull that puppy out of there and do it properly the second time.
     
    BuickV8Mike and magic marouke like this.
  3. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I didn't realize you could get that ring in there without pulling the distributor apart.
     
  4. magic marouke

    magic marouke Well-Known Member

    Ok so now I know the timing is off I’ll get that right , install the pertronix hopefully in the right spot this time . Then check the timing again ?
     
  5. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Turn your crank to 15* BTDC. Set your distributor to the mark on the rim (#1). The vacuum tube at 7:30pm dump some fuel and try. If no cough or anything try 180* out. You need to find HOME with the Pertronics on the baseplate for sure. I've had BAD luck with Pertonix only recently!
     
    magic marouke likes this.
  6. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Pour two tablespoons of gas down the carb.;);)
     
  7. magic marouke

    magic marouke Well-Known Member

    so I timed the car to 4 tdc from 0 so it was out quite a bit . installed the pertronix again and the same thing happened , backfire !
    then I tried using the original ignition wire in the car and it fired right up . had been using a wire going from the accessory
    in the fuse box to the coil that someone advised me to . had to check the timing again which was out quite a bit again and drive a couple of times for it to settle down .
    car starts good , idles better and is a smooth ride .
    cheers everyone for the help
     
  8. magic marouke

    magic marouke Well-Known Member

    Guessing spoke too soon . Drove it home from work and everything was fine . Left it outside for a couple hours then go to put it in the garage . It idled rough in park and in drive with foot on the brake . I’m getting fed up now, it has to be something I’ve done .
    Any ideas guys ?
     
  9. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Try points.
     
  10. magic marouke

    magic marouke Well-Known Member

    That’s what I had in before . At this stage I wanna put them back in
     
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  11. magic marouke

    magic marouke Well-Known Member

    It
    It was working fine yesterday when I installed it and today at work . Two hours after getting home and starting it up though it ran rough and I didn’t do a thing . A guy advised me to run a wire from the accessory, only worked when I used the one in the harness .
    So I just put the points back in and timed it and it’s still running really rough . Somethings happened and I don’t know what . I’m no expert mechanic but I will try my best to fix things .
     
  12. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Assuming you have properly timed it...I would get a can of starting fluid and see if you can identify a vacuum leak. Or your distributor assembly is BEAT, and in California you would be labeled a Gross Polluter.
     
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  13. magic marouke

    magic marouke Well-Known Member

    I’m probably thinking it’s toast to seeing as I put the points back in and it’s still the same . Would a complete HEI distributor be the way to go if that’s the case ?
     
  14. magic marouke

    magic marouke Well-Known Member

    I used a new coil with the pertronix and the original coil for the points so I don’t think it’s that Bill . Yes the guy said something about a ballast so to use the wire
     
  15. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    The wire itself is a resistor (ballast). It plays an important role in limiting the voltage to the points.
     
  16. CJay

    CJay Supercar owner Staff Member

    Lets take a deep breath here and start with the basics. Lets start at step one instead of skipping all the way to step 12. Pertronix will run on the factory resistance wire. Ive called Pertronix in the past and they have said that theyre units will run on straight 12 volts . So wiring it to the battery wont necessarily damage it.

    Why would it run well with the Pertronix then 2 hours later run rough? Id have to think its a simple problem. Did the choke stick closed possibly? Do you have a vacuum gauge?
     
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  17. magic marouke

    magic marouke Well-Known Member

    No I didn’t
     
  18. magic marouke

    magic marouke Well-Known Member

    I did look all over the engine to look for obvious things like plug wire off , vacuum lines , lose wire etc. don’t have a vacuum gauge
     
  19. BuickV8Mike

    BuickV8Mike SD Buick Fan

    How much play do you have in the distributor shaft?
     
    Smartin likes this.
  20. CJay

    CJay Supercar owner Staff Member

    Is it possible you forgot to tighten the hold down bolt for the distributor? Recheck the timing, check to make sure the choke isn't sticking, recheck the firing order.
     

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