No Spark??
Thread Starter
Cruising
Joined: Jul 2021
Posts: 11
Likes: 1
No Spark??
Hi all! My 1980 L48 has no Spark. Replaced module, cap and rotor. I'm getting 12v at distributor and rotor is turning. Wiring looks OK .
Bench tested coil and results are as follows
Primary resistance is .2 ohms
Secondary is 35.53 ohms.
Any ideas would be greatly appreciated...
Bench tested coil and results are as follows
Primary resistance is .2 ohms
Secondary is 35.53 ohms.
Any ideas would be greatly appreciated...
Race Director
Joined: Nov 2006
Posts: 13,068
Likes: 7,682
From: Sunshine Coast, Queensland, Australia
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Cruise-In VIII Veteran
Have you tested the pickup winding? New Module junk? Test coil by snapping the signal wire (yellow or white) to ground?
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
Check the hall effect pickup "coil"......this tells the module to fire the coil......and was the second most common HEI failure......
I won't replace them anymore unless the customer HAS to have their original distributor.......I usually stick a 906 GM crate engine HEI.
GM (General Motors) - 93440806 - HEI Performance Distributor (paceperformance.com)
But you pay me the same money to put a pickup coil in a 40+ year old distributor or stab this new one in.......the crate distributor has a much better curve.
Jebby
I won't replace them anymore unless the customer HAS to have their original distributor.......I usually stick a 906 GM crate engine HEI.
GM (General Motors) - 93440806 - HEI Performance Distributor (paceperformance.com)
But you pay me the same money to put a pickup coil in a 40+ year old distributor or stab this new one in.......the crate distributor has a much better curve.
Jebby
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
I will assume that when you swapped-out caps you checked the little spring & rubber washer in the bottom of the cap before you installed your old coil?
Remove the dust cover. On one corner of the coil, a black wire is attached or should be attached to one of the four hold-down bolts. If the coil has excess paint on the metal, remove that down to bare metal. Reattach GRD wire.
Where the wire harness attaches to the side of the cap, Yellow, Red, Black wire clips, can sometimes show false illusion of a good connection.
Perhaps clean contacts and apply a dab of dielectric grease.
Remove the dust cover. On one corner of the coil, a black wire is attached or should be attached to one of the four hold-down bolts. If the coil has excess paint on the metal, remove that down to bare metal. Reattach GRD wire.
Where the wire harness attaches to the side of the cap, Yellow, Red, Black wire clips, can sometimes show false illusion of a good connection.
Perhaps clean contacts and apply a dab of dielectric grease.
Thread Starter
Cruising
Joined: Jul 2021
Posts: 11
Likes: 1
Thread Starter
Cruising
Joined: Jul 2021
Posts: 11
Likes: 1
I will assume that when you swapped-out caps you checked the little spring & rubber washer in the bottom of the cap before you installed your old coil?
Remove the dust cover. On one corner of the coil, a black wire is attached or should be attached to one of the four hold-down bolts. If the coil has excess paint on the metal, remove that down to bare metal. Reattach GRD wire.
Where the wire harness attaches to the side of the cap, Yellow, Red, Black wire clips, can sometimes show false illusion of a good connection.
Perhaps clean contacts and apply a dab of dielectric grease.
Remove the dust cover. On one corner of the coil, a black wire is attached or should be attached to one of the four hold-down bolts. If the coil has excess paint on the metal, remove that down to bare metal. Reattach GRD wire.
Where the wire harness attaches to the side of the cap, Yellow, Red, Black wire clips, can sometimes show false illusion of a good connection.
Perhaps clean contacts and apply a dab of dielectric grease.
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Thread Starter
Cruising
Joined: Jul 2021
Posts: 11
Likes: 1
I will check the wiring. Thanks