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  #21  
Old 07-20-2018, 03:26 AM
ORIGLS6 ORIGLS6 is offline
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If it's on the Corvette, check your grounding.
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  #22  
Old 07-20-2018, 03:27 AM
Lynn Lynn is offline
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Checked the # 2 wire with an ohm meter, and compare with others? Not likely you got two bad ones, but possible.

Next step is kind of a pain, but assuming you have put an ohm meter on the two (2) plug wires you have tried, and they both show good, next step is to pull the distributor, put it in 180 out. Rotate all the wires 180. Start it up. If #3 now has a weak spark, you have pinpointed the distributor as the issue. If #2 still has weak spark, you have eliminated the distributor as the issue. Not likely the coil if it only affects one cylinder.

If you don't have a spare distributor laying around, I would be glad to send you a functioning one (won't be curved exactly right for your car, but will at least let you know if it is the distributor.
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  #23  
Old 07-20-2018, 11:33 AM
DarrenX33 DarrenX33 is offline
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This is on my Corvette.
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  #24  
Old 07-20-2018, 02:38 PM
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67 Nova Boy 67 Nova Boy is offline
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Have you replaced your spark plugs...not uncommon to have a plug or two go bad.

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  #25  
Old 07-20-2018, 10:51 PM
DarrenX33 DarrenX33 is offline
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Quote:
Originally Posted by Lynn View Post
Checked the # 2 wire with an ohm meter, and compare with others? Not likely you got two bad ones, but possible.

Next step is kind of a pain, but assuming you have put an ohm meter on the two (2) plug wires you have tried, and they both show good, next step is to pull the distributor, put it in 180 out. Rotate all the wires 180. Start it up. If #3 now has a weak spark, you have pinpointed the distributor as the issue. If #2 still has weak spark, you have eliminated the distributor as the issue. Not likely the coil if it only affects one cylinder.

If you don't have a spare distributor laying around, I would be glad to send you a functioning one (won't be curved exactly right for your car, but will at least let you know if it is the distributor.
Holy cow what a nice offer, and I very much appreciate that.. I do happen to have a spare distributor here with me. I am going to try and put it in. I will also consider the experiment you mentioned here. I think I will be able to solve this soon.
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  #26  
Old 07-20-2018, 10:53 PM
Carolina Dreamin' Carolina Dreamin' is offline
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Check your messages, Tom
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  #27  
Old 07-22-2018, 03:22 PM
DarrenX33 DarrenX33 is offline
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Ok. It was the distributor. I dropped in my old Unilite and it ran great. I have a thought as to what is wrong with it but I will wait until it is looked at. Sending it back to be checked out.
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  #28  
Old 07-23-2018, 05:29 AM
Kurt S Kurt S is offline
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Quote:
Originally Posted by 427_Rat View Post
If one lobe on the distributor cam (for #2 cyl.) was wore down, might prevent spark at low RPM and allow a weak spark at higher RPM when points "bounce"...possibly?
If it was a bad lobe, I don't know that the distributor machine would have caught that.....
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Old 07-23-2018, 01:45 PM
Steve Shauger Steve Shauger is offline
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Quote:
Originally Posted by Kurt S View Post
If it was a bad lobe, I don't know that the distributor machine would have caught that.....
Also when it was being rebuilt it most likely would have been found.
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  #30  
Old 07-23-2018, 04:54 PM
L78steve L78steve is offline
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Quote:
Originally Posted by Kurt S View Post
If it was a bad lobe, I don't know that the distributor machine would have caught that.....
Yes it would. You look around the whole dial and you can see the spark events of each lobe.
If one lobe is worn it would show a late spark on that lobe.
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