Stalled while driving, cranks but will not restart - likely spark problem... 1979 CDV - Page 2
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1985-1996 Fleetwood and Brougham Forum Discussion, Stalled while driving, cranks but will not restart - likely spark problem... 1979 CDV in Past Cadillac Vehicle Discussion; Originally Posted by cadillac_al It probably wouldn't hurt to make sure the dist hot wire has 12 volts before you ...
  1. #16
    csbuckn is offline Cadillac Owners Master
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Quote Originally Posted by cadillac_al View Post
    It probably wouldn't hurt to make sure the dist hot wire has 12 volts before you replace anything.
    This would be my next move just to make sure your fusible link is still good.

  2. #17
    Benzilla's Avatar
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    It was the module! Replaced it with an ac delco, and the car started right up.

    One problem: I took it for a test drive, and it's making a high-pitched electrical squeal sound. Like a street light. Came home, left it running & popped the hood. It's coming from the distributor, and with the hood open I could hear random sparking. Car ran fine, this is new... Any ideas?

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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Put dilectric grease in the plug boots, and make sure they're on snug.

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    carnut is offline Cadillac Owners Master
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Pull the cap and verify the rotor is not hitting any thing inside.

  5. #20
    Benzilla's Avatar
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Thank, will double check, but I'm very careful, double checked everything or so I thought. Can I find dilectric grease at auto parts stores? Old cap had none on it, figured I'd be ok without. Will check cap & rotor again... all looked fine on installation. Plugs are definitely on tight, checked.

    Will update.

  6. #21
    1980coupe's Avatar
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Quote Originally Posted by Benzilla View Post
    It was the module! Replaced it with an ac delco, and the car started right up.

    One problem: I took it for a test drive, and it's making a high-pitched electrical squeal sound. Like a street light. Came home, left it running & popped the hood. It's coming from the distributor, and with the hood open I could hear random sparking. Car ran fine, this is new... Any ideas?
    I told you it was the module...

  7. #22
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    You are supposed to put dielectric grease on the metal plate on the base of the module. The grease is also to be used n the rubber seal on the top of the cap. You can use Vaseline in lieu of packaged dielectric grease.

  8. #23
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Quote Originally Posted by 1980coupe View Post
    I told you it was the module...
    I never said it wasn't, just said I'd be disappointed if it was. Who actually says 'I told you so' as a response to something getting fixed? lol

    Quote Originally Posted by deVille33 View Post
    You are supposed to put dielectric grease on the metal plate on the base of the module. The grease is also to be used n the rubber seal on the top of the cap. You can use Vaseline in lieu of packaged dielectric grease.
    I used that on the module, just didn't know that's what it was called. Any time I see it's it's this tiny packet that's just described as a special heat sauce or some sh*t, like it's supposed to go on a whopper or something. I wasn't even sure where to find it without buying it with a module.

  9. #24
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Here's a video of the sound I'm trying to describe. Went out this morning & made sure everything was on tight & straight. Took the rotor off & made sure the module was connected right. Checked the carbon button, contacts.... everything looks perfect & new. Plugs are on tight, cap is seated firmly. Rechecked all ignition coil wiring... I can't find a thing wrong. I'll try putting vasoline under the spark plug wire boots. I never would have thought to do that, ran fine for me 15,000 miles & 7 years without lube on the wires.

    VIDEO - You can hear the squeal pretty well, like giant crickets. A random zap happens just before I walk away to end the video, listen for it. Keep in mind it didn't do this until I was replacing parts yesterday.
    http://www.youtube.com/watch?v=agnO4CutcC8

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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Update,

    I took the whole distributor out to make sure the shaft wasn't seizing up or something. I can not get it to squeal spinning it by hand. It spins freely, and quietly. Feels well oiled & healthy. From the google research I did, I thought maybe the shaft was about to lock up or something. Most people with that problem were able to feel resistance while turning it by hand. Mine feels fine. It definitely didn't make this sound before the new parts, it's very noticeable while driving or just standing next to the car once it idles down all the way. Checked all to the belts too for the hell of it. Does not change with rpm or speed, just constant while the engine is running.

    Still hunting..

  11. #26
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    It sure sounds bad. I don't recognize it at all. I can't imagine how a module could cause that. When you put the dist in does it seat all the way down on the manifold? It seems like half of the distributors that I put in over the last few years don't seat all the way. I have put double gaskets on a few because I'm scared of cranking it down too tight and hurting the dist gear or oil pump.

  12. #27
    guyrobert is offline Cadillac Owners Member
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    My air con belt was a titch loose/worn and caused a squealing sound like that, replaced it and it went away.

  13. #28
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    Quote Originally Posted by cadillac_al View Post
    It sure sounds bad. I don't recognize it at all. I can't imagine how a module could cause that. When you put the dist in does it seat all the way down on the manifold? It seems like half of the distributors that I put in over the last few years don't seat all the way. I have put double gaskets on a few because I'm scared of cranking it down too tight and hurting the dist gear or oil pump.
    Yeah, distributor fits perfectly, drops down flat. That sounds like a pretty big deal, lol! I'd feel pretty uneasy driving with that problem.

    A friend suggested that it might be the rotor is too long, & making contact with the cap contacts while it's spinning. So tomorrow I'll try my old cap & rotor with everything else the same & see if the sound goes away. After that, about all that's left is the new coil.

    Will report back.
    -Ben

  14. #29
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    YES!!! Swapped in the old cap & rotor, started it; sound GONE. I'm thrilled that we figured it out, while simultaneously horrified by such a big problem on AC Delco's part... a Brand new cap & rotor, from the same company, shouldn't clash with each other! Visually, the old & new parts look functionally identical to the naked eye, must be the slightest difference just completely messed it up.

    Thanks for all the great advice, everyone!

    Ben

  15. #30
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: Stalled while driving, cranks but will not restart - likely spark problem... 1979

    With some of the early large cap HEI's there were some produced that had different clearances between the rotor edge and the terminal contacts. Oldsmobile come to mind. Could be one of the parts were boxed wrong or a parts man picked up the wrong part number.

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