No Spark w/HEI

825 Views 5 Replies 3 Participants Last post by pop d top, Sep 10, 2004

pop d top

Discussion Starter · Sep 9, 2004

I removed and replaced the HEI while working on my car and now get NO SPARK. There is a full 12V at the wire I had previously run when the ignition switch is in run. If I have my Voltmeter on the wire then "touch" the wire to the BATT terminal in the cap...voltage drops to less than a volt (I don't know if that's significant or a red herring). I swapped out the coil AND the module from another running HEI equipped car and the other car ran fine, but the "new" parts still had me spark free. Swapped everything back...no changes. I'm sure it's something stupid and simple that I'm overlooking...but I'm more than a bit frustrated and confused. Heeeeeelp!?!?

SKIP

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Ark68SS

· #5 · Sep 10, 2004

Originally posted by pop d top:
There is a full 12V at the wire I had previously run when the ignition switch is in run. If I have my Voltmeter on the wire then "touch" the wire to the BATT terminal in the cap...voltage drops to less than a volt (I don't know if that's significant or a red herring).
SKIP

To read the voltage at the wire, one lead is attached to the wire, and the other lead to a ground. If you attach one lead to one end of the wire, and the other lead to another end of the wire, you are reading voltage drop. Less than 1V is normal.

You may have a bad connection at the bulkhead connector on the firewall. Loosen the bolt in the connector & pull it apart and look for corrosion on the terminals, clean them up and put the connector back together & see what you get.

BL

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