72 No Spark
Thread Starter
Intermediate
Joined: Jan 2015
Posts: 35
Likes: 0
72 No Spark
Hi I am trying to diagnose no spark on my 72 454 restoration. Stock single points distributor. I have 10.5 volts on + side of coil when cranking which is the same reading on the battery when cranking. 6.9 volts in run position. New points gapped at .019. New cap and rotor. tried 2 new correct coils. Wiring harness is new from lectic limited. plug wires are new from lectric limited. Test light blinks when put on the - side of coil when cranking. I took apart the starter solenoid and cleaned all internal connections. I am stumped.
Burning Brakes
Joined: Mar 2006
Posts: 829
Likes: 131
From: Spartanburg SC
I'm probably making a fool of myself, but here goes. On my 72 sb, the wire from the coil and the wire from the condenser have to be in a specific order when attached to the points. I read that over 40 years ago. I would have to go out and look at mine to be sure, but, I think the condenser wire has to be on the outside. This is a stab in the dark. It sure would be an easy fix.
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Joined: May 2006
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why do you have only 10.5 volts when cranking, that would indicate a very discharged battery?
you dont own a dwell meter so you can set it to 30 degrees while cranking?
if you hold the coil wire end, with insulated pliers, that is normally inserted into the center of the cap near metal do you see a spark?
you dont own a dwell meter so you can set it to 30 degrees while cranking?
if you hold the coil wire end, with insulated pliers, that is normally inserted into the center of the cap near metal do you see a spark?
