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Old Aug 18, 2018 | 05:53 PM
  #61  
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Originally Posted by number3
.... but under the rotor is some kinda mechanical marvel sitting on top of the module preventing me from getting at the screws holding the module in place
probably time to get us some pictures...
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Old Aug 18, 2018 | 06:19 PM
  #62  
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Originally Posted by number3
ok heres the latest , i took off the splash pans , wired open the exhaust flapper on the passenger side header, took the fuel filter off the intake manifold and swung it around so it was in front of the oil filler tube not touching anything hot , adjusted the fuel line from frame to fuel pump cause it had a little flatness to it , took her for a good run came back , no start fuel filter just as hot as before , waited ten minutes and it fired right off . Its hot and humid here and im as hot as the engine so its time to visit my old pal jim beam and his pal amstel , tomorrow is another day. Thanks for all the help
Again: you need to do what I posted in post 45. Spray some fuel down the carb and see if it starts. If not, check for spark. You have to determine if it's one or the other. Moving the fuel filter around and checking its temperature is getting you nowhere fast. You either have fuel in the carb or you don't. Check and see.
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Old Aug 19, 2018 | 06:38 AM
  #63  
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Originally Posted by GTOguy
Again: you need to do what I posted in post 45. Spray some fuel down the carb and see if it starts. If not, check for spark. You have to determine if it's one or the other. Moving the fuel filter around and checking its temperature is getting you nowhere fast. You either have fuel in the carb or you don't. Check and see.
your right , i just thought id try a couple easy fixes first, when ill give it a try the next time this happens and keep ya posted , i bought a temp gun yesterday and will also get some readings and some pics will be coming also
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Old Aug 19, 2018 | 09:08 AM
  #64  
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Originally Posted by number3
your right , i just thought id try a couple easy fixes first,

............and that is why you're not making any headway. You're fixing before you know what is wrong.

Last edited by MikeM; Aug 19, 2018 at 09:09 AM.
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Old Aug 19, 2018 | 09:30 AM
  #65  
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Originally Posted by MikeM
............and that is why you're not making any headway. You're fixing before you know what is wrong.
I look at it this way mike , it didnt cost me anything but a littel time on my end , if some of the easy fixes worked and problem solved , id be way ahead of the game , it just so happens they didnt work so now ill dig a little deeper and hopefully find the issue and cause
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Old Aug 19, 2018 | 09:49 AM
  #66  
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Well, this is the way I look at it. It takes about 15 seconds with a test light to see if your whiz bang ignition module is working and another ten seconds to see if fuel supply is the problem.

But you can go ahead and replace your parts at random and as you wish and maybe you'll stumble on to something. Maybe my way is a little different?

Last edited by MikeM; Aug 19, 2018 at 09:49 AM.
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Old Aug 19, 2018 | 09:59 AM
  #67  
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Originally Posted by MikeM
Well, this is the way I look at it. It takes about 15 seconds with a test light to see if your whiz bang ignition module is working and another ten seconds to see if fuel supply is the problem.

But you can go ahead and replace your parts at random and as you wish and maybe you'll stumble on to something. Maybe my way is a little different?
I fully understand what your saying however i read what a few guys here on the forum did and worked for them .I think your way is the way i will go today , what would your procedure be to test that module ? tia
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Old Aug 19, 2018 | 11:27 AM
  #68  
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Originally Posted by Factoid
Is this the module you have installed in your stock distributor?

https://static.summitracing.com/glob..._gm_61001M.pdf

If so, your choice of coil and use of a ballast resistor or not is critical. If this is the module, please read the directions posted and ensure you either use the ballast resistor with a stock coil or one of the listed coils without a ballast resistor. This could be your problem and if improper components were used, overtime you could have damaged the Mallory module.
the set up i have is similar to that one i believe it has the 605 module , but i cant get at it until i figure out how to get the centrifugal setup off , if i put a meter on the wires from it what should i get for a reading ?is that possible ?
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Old Aug 19, 2018 | 12:22 PM
  #69  
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Originally Posted by number3
I fully understand what your saying however i read what a few guys here on the forum did and worked for them .I think your way is the way i will go today , what would your procedure be to test that module ? tia
Put a test light on the minus side of the coil, ground it and spin the engine. Your light should flash brightly, on/off/on/off. If it doesn't, your gadget is likely not working.

Never tried it on a Mallory but that test works for points and other electronic gizmos I've done it on.

Post #45 was good advice for a shortcut to find out what you need to work on..
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Old Aug 19, 2018 | 12:24 PM
  #70  
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Originally Posted by MikeM
Put a test light on the minus side of the coil, ground it and spin the engine. Your light should flash brightly, on/off/on/off. If it doesn't, your gadget is likely not working.

Never tried it on a Mallory but that test works for points and other electronic gizmos I've done it on.

Post #45 was good advice for a shortcut to find out what you need to work on..
Thanks mike i appreciate it !
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Old Aug 19, 2018 | 12:53 PM
  #71  
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Originally Posted by Frankie the Fink
A $20 Harbor Frieigjt I/R temperature gun aimed at the fuel bowls the next time you have an issue will tell the tale. Anything north of 140* is a problem.

And maybe a new mechanic.
More diagnosis and less parts swapping.
^^^^^^^^^^ start there.. had an 84 L69 equipped Z28.. whenever car sat for 30 minutes to an hour in hotter temps as soon as i drove off (enough time for the fuel in the line near the intake to reach the carb) it would bog... and drive like crap for about a minute...

I fixed it by wrapping the fuel line with a simple rubber hose...

they stopped making that engine one year later but still offered the base 4 bbl carb engine. mine had the dual snorkel air cleaner which must have kept the heat inside and over the fuel line enough for them to bail on the design inside that cramped engine compartment.

good luck with the fix.. you'll get it. .
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Old Aug 19, 2018 | 01:42 PM
  #72  
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Originally Posted by 16/C7Z

^^^^^^^^^^ start there..
good luck with the fix.. you'll get it. .

I am just curious as to your logic for "starting there". He doesn't know what is wrong, yet.

Maybe I can learn a better method by throwing darts blindfolded at the donkey's butt?

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Old Aug 19, 2018 | 02:36 PM
  #73  
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Originally Posted by MikeM
I am just curious as to your logic for "starting there". He doesn't know what is wrong, yet.

Maybe I can learn a better method by throwing darts blindfolded at the donkey's butt?
I think he was talkin about the post above from frankie the fink .about taking heat readings

Last edited by number3; Aug 19, 2018 at 02:36 PM.
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Old Aug 19, 2018 | 02:39 PM
  #74  
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Figures today its as cool as it could get here and i cant get it to not restart !!!, i hope tomorrow itll be a little warmer so i can make it happen . Been in the 80's and 90;s for a month today feels like 60 here !
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Old Aug 19, 2018 | 05:17 PM
  #75  
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Okay , i got it out for a ride struggled to get up to 180 degrees , got about 20 miles and it started to break down pulled into wally mart shut it off wont start , temp readings on exhaust manifolds 535 , fuel bowls 133 fuel filter 140 after we stopped gave it some gas no start , checked for spark zero, im thinking that my module is shot and my timing is off . chime in with your opinions please , thanks to all !
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Old Aug 19, 2018 | 05:55 PM
  #76  
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Originally Posted by number3
Okay , i got it out for a ride struggled to get up to 180 degrees , got about 20 miles and it started to break down pulled into wally mart shut it off wont start , temp readings on exhaust manifolds 535 , fuel bowls 133 fuel filter 140 after we stopped gave it some gas no start , checked for spark zero, im thinking that my module is shot and my timing is off . chime in with your opinions please , thanks to all !
I mentioned this earlier but wasn't sure what your problem was. If it IS your module (and it sounds likely) and you replace the module with another Mallory, add this circuit guard. It's a simple plug-n-play. I've had my Mallory Unilite with this protector for 6 years and, so far, no problems.

https://www.jegs.com/i/Mallory/650/29371/10002/-1

Steve
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Old Aug 19, 2018 | 06:01 PM
  #77  
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Originally Posted by RatDog
I mentioned this earlier but wasn't sure what your problem was. If it IS your module (and it sounds likely) and you replace the module with another Mallory, add this circuit guard. It's a simple plug-n-play. I've had my Mallory Unilite with this protector for 6 years and, so far, no problems.

https://www.jegs.com/i/Mallory/650/29371/10002/-1

Steve
thanks steve , i appreciate that!
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Old Aug 19, 2018 | 06:18 PM
  #78  
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Originally Posted by number3
Okay , i got it out for a ride struggled to get up to 180 degrees , got about 20 miles and it started to break down pulled into wally mart shut it off wont start , temp readings on exhaust manifolds 535 , fuel bowls 133 fuel filter 140 after we stopped gave it some gas no start , checked for spark zero, im thinking that my module is shot and my timing is off . chime in with your opinions please , thanks to all !
Well, it sounds like you have determined it is NOT fuel percolation so one thing eliminated.
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Old Aug 19, 2018 | 06:25 PM
  #79  
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Originally Posted by 68hemi
Well, it sounds like you have determined it is NOT fuel percolation so one thing eliminated.
yeah im thinkin its gotta be that damn module
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Old Aug 19, 2018 | 06:40 PM
  #80  
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Now we’re getting somewhere!

Is this the stock distributor with a Mallory module installed? If so, use the shop manual to remove the mechanical advance. If memory serves, you have to remove the distributor, but don’t go by my feeble memory, use the manual.

Okay, you need to determine the required ignition configuration for this module! It may have failed due to improper components as you said the ballast had been in and out. They don’t fail immediately if the components are incorrect, but over time as the higher than required current heats it up. Then it fails when it gets hot before finally dying for good. You need the correct coil and ballast resistor. Better yet, pick a coil that works with this module without the need for ballast and clean up your engine bay a bit. Good luck!
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