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Old 08-09-2014, 05:23 PM   #1
mechanicalman
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Re: 68 c10 L6 engine vibration problems

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Originally Posted by davepl View Post
Nope. You cannot diagnose resistance with a volt meter unless there's a load. You'll measure 12V on a resistance wire just the same as you would a superconducting liquid-helium-cooled monster cable.

I don't know if, with the engine running, the coil would put enough load to show up on a DVM at the coil with a resistance wire. I suspect it would not, but actually have never tried it.
Well, that's nice, but but WE are only checking for voltage. Don't know where you came up with us checking resistance.

NOPE we NEVER said we were checking resistance. FYI: We would be using a ohm meter, not a volt meter. Ohm meter NEVER came up in the conversation, nor did "digital".

I WILL, however, contact YOU when diagnosing "superconducting liquid-helium-cooled monster cable". LOL

Last edited by mechanicalman; 08-09-2014 at 05:25 PM. Reason: add-on
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Old 08-09-2014, 04:55 PM   #2
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Re: 68 c10 L6 engine vibration problems

BTW, the 12 wire from the firewall (ignition switch) goes to the pos + side of the coil and the wire from the neg - side of the coil goes to the distributor.

And again, just for grins, while you have your voltmeter out and working take the red lead and touch it to the pos side of the battery, then take the black lead and touch it to the side of the distributor. If you get around 12 volts, your distributor has a ground. It would be hard for the distributor to lose it's ground unless the hold-down bolt/plate is extremely dirty or rusted. If you don't get a ground, take the hold-down plate and bolt out and clean wire brush them up also on the distributor neck where the hold-down plate touches, and maybe run a tap down where the bolt goes in the block.

SO

IF you have verified the coil is properly wired, AND you have power going into the distributor, AND ground at the distributor body, you have narrowed it down to coil/distributor. If still no spark, try a known good coil. If still no spark, it has to be the distributor.

IF you are still having problems,

Do what I have told you, and tell me what you come up with.

Last edited by mechanicalman; 08-09-2014 at 04:59 PM. Reason: add-on
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Old 08-09-2014, 03:46 PM   #3
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Re: 68 c10 L6 engine vibration problems

My buddy and I did a timing chain in his Dart once,and tuned it up while we were at it,points plugs wires cap rotor.When we finished,it wouldn't start.We tore it down again and double checked everything and it still wouldn't start. We finally took it to a friend who has been a mechanic literally all his life and he took one look at it and said.Out new points in it.Started right up.
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Old 08-10-2014, 03:02 PM   #4
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Re: 68 c10 L6 engine vibration problems

Let's stay on task here. We have a member needing some help. We don't need the extracurricular activity.
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Old 08-10-2014, 03:17 PM   #5
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Re: 68 c10 L6 engine vibration problems

I don't live near this guy. Does anyone? Sounds like he really needs someone to come give him a hand.
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Old 08-11-2014, 10:34 AM   #6
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Re: 68 c10 L6 engine vibration problems

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Originally Posted by Codez67Chevy View Post
I don't live near this guy. Does anyone? Sounds like he really needs someone to come give him a hand.
That would be cool! I'm buying HEI Distributor today, hoping this helps me with the charge and starting issues. As for the shaking not sure, I'll have to reset the timing and see if this helps correct the problem. Thank you all for the help. I'm determined to get it running better.
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Old 08-10-2014, 03:35 PM   #7
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Re: 68 c10 L6 engine vibration problems

Dittos to that!
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