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Tractor Talk Discussion Forum

Small Block Chevy Gurus - Ign. Ques. ?

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Billy NY

02-27-2007 20:17:35




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Quick one on an ingnition problem:

H.E.I. Dist, late 60's 350

No spark, have not pulled the plugs to see, getting fuel, new parts; ign. module-(pick-up) coil, cap, rotor, plugs and wires new a few years ago, but champions, my luck all 8 plugs are junk at the same time, forgot, should have got AC or Autolite ones, champs can be N/G, but never heard of all 8 goin at once, was running briefly after sitting awhile, will pull plugs and see when someone can turn it over whilst I watch, double check connections at coil, have power to coil at end of wire, have to check on coil side of connection, ground etc. but they are plugged in tight.

Cap that I took out, around the brush, center of cap, spring loaded contact thing - looked like it got hot, burned up a little, figured that was it. not the first time this ole truck stumped me over the years, but always took another set of eyes to figure it out, always something stupid, These were always so easy to work on, must be losin it or somthin the older ya git...

Had one of then accel modules in a vette w/350, on the dist. boy that started on the first turn every time, nothing like a hot ignition in these, even in this old plow truck, might just have to..

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Don Hopf

02-28-2007 15:16:46




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
Was the HEI originally equipment in this vehicle? On the points/coil setup, the white wire to the coil was a resistive wire so the points wouldn't burn up but it would only supply about 6 volts when the engine was running. You need to have a full 12 volts at power connection of the HEI dist. I used the thottle soleniod wire on a 69 Chevelle that I converted to HEI.



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ElmTree893@aol.com

03-01-2007 09:10:33




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Don Hopf, 02-28-2007 15:16:46  
Truck is a 1980 K-10, so it had HEI I believe, the motor is a late 60's 350 with HEI dist., I can double check the voltage to make sure, might have time to fool with it today, sunny out, snow cover, well lit up so I can see in there, got to be something stupid as I keep saying, LOL, will post again when I figure it out.



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Allan In NE

02-28-2007 08:44:54




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
Billy,

Check the fuse link and/or ignition switch.

Allan



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Billy NY

02-28-2007 09:48:00




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Allan In NE, 02-28-2007 08:44:54  
Seems I've got power to the end of wire with the white clip on connector, when the ignition switch is on the run position, have not checked the connection on the coil side yet, never know, maybe the male end pushed to one side where it sits in the cap, typical HEI push em in from the top side and plug the bottom in. I once used a filed down jig saw blade for kind of a bus-bar in a chevy once, connectors locked on no problem, and worked for years.

I'll check all wiring thoroughly, have learned in the past that problems can be well hidden and right in front of you at the same time. Has to be something stupid, I'm not seeing, mice sometimes cause problems here, usually they make just make a mess, and don't bother wiring too much, few times over many years have I found shorted wiring from mice, but not as much as you would think. I trapped 2 dozen a year ago outside and the cat next door has been hunting around my yard, not one sign of mice out there this year, this guy is house kept, but what a hunter.

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Allan In NE

02-28-2007 10:13:43




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-28-2007 09:48:00  
If you've got juice at that white connector wire, it should run and the problem has got to be in that distributor somewhere.

Got a good engine ground? Is the rotor turning?

Allan



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Billy NY

02-28-2007 10:24:27




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Allan In NE, 02-28-2007 10:13:43  
Engine ground is secure to the alternator bracket and the rotor is turning, but easy enough to double check, I'm hoping nothing has changed with the distributor, never know, but at least it's a small block chevy, not too hard to change that distributor. I had it running briefly after swithching out the carb, then had the plug wires misplaced on a few cylinders, forgot, tried to start er, poppin and snortin out the carb reminded me of that, checked them from #1 using the firing order, and position on the cap, corrected the them, but will have to double check everything again, if not the distributor, it's going to be something really stupid and y'all might have a laugh when I do figure it out is what I'm thinkin, sure gettin interesting, hopefully I'll get back in time with some daylight to fool with it again.

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Allan In NE

02-28-2007 11:40:22




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-28-2007 10:24:27  
If it's poppin', snortin' and belchin' out the carb, then you have fire. Sounds like it is out of time.

What year is it? Maybe that chain jumped a cog on a plastic gear?

Allan



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Jon Holt

02-28-2007 08:21:59




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
If you have a tachmeter, check at the tach terminal at the distributor. If you have a tach signal and no spark, then you probably have a bad coil, no tach signal, check ignition module.



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Billy NY

02-28-2007 09:32:18




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Jon Holt, 02-28-2007 08:21:59  
No tach, and I replaced the coil, wired up the same that was in there, also replaced the ingnition module, but I will look in there again to see if there is anything not connected, strange, acted the same prior to the cap and rotor being replaced, replaced those, as the cap was burnt at the brush, same thing, champ 3052's in there, will pull those and the wires, replace wires and plugs with A/C's or autolite and see.

I suppose one of the plugs with a long wire I might be able to rest on where I can see it, look for a spark whils't I turn it over.

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D13

02-28-2007 08:21:59




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
Didyou spin it with the cap off to make sure the distributor shaft is turning?



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Billy NY

02-28-2007 09:24:13




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to D13, 02-28-2007 08:21:59  
She's turnin, rotor was in a different position when I pulled the cap again, to replace the module.



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Alkay

02-28-2007 06:16:22




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
Make sure you have the ground strap for the coil inside the coil cover cap. There should be a piece of metal going from the plug in area to one of the bolt holes of the coil. Good luck!



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Billy NY

02-28-2007 06:33:27




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Alkay, 02-28-2007 06:16:22  
That is on there actually, a short wire, with an eyelet for the screw to pass and the male end in the plug, it's got to be something really stupid, I'll be foolin with it some more today, nice out finally !

Some had that metal strap, I recall, it came with the new coil, funny I replaced all the parts except that condensor look alike thing that is tied into the ign module, still does the same thing.

A few of the spark plug wires were jumbled after the headers were put on, 2 of us put those one quickly, she was firin and puff'n through the carb, I forgot his side was off, but that has never fried an ign sys, before, I almost remembered the firing order and where #1 was, but had to look it up on the web, straightened the wired out, had it barely running, now no spark, but that cap was burned where the brush contacts the coil though. Something foolish, have to to check everything closely again, replace the plugs etc.

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Glen in TX

02-27-2007 20:42:57




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:17:35  
When you mentioned the spring thing looked like it got hot don't you suppose the coil might have too? I bet no or weak spark and coil is toast and maybe module too? Put some Denso plugs in there or try them sometime. I've even had a set of AC plugs bad out of the box before on a new engine and that was aggravating. Yeah the Accel coils were hot and good but there are others now hotter for less $$. Good luck.

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Billy NY

02-27-2007 20:51:43




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Glen in TX, 02-27-2007 20:42:57  
Cap, rotor, coil, module(pick-up) are all new today, plugs and wires like 3 years ago, have to get the test light out, pull the plugs etc. double check connections, something is awry, figured I'd get a cylinder to fire, motor was fresh, 20-25000 miles before retired to the yard.



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Glen in TX

02-27-2007 22:09:00




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 Re: Small Block Chevy Gurus - Ign. Ques. ? in reply to Billy NY, 02-27-2007 20:51:43  
Make sure you have 12+ to 14.5V to the HEI.



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