Thread: Engine Swap - '92 5.0EFI/AOD into '66 Ford F100....

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Originally Posted by NTFDAY

It seems to me that you need to eliminate the resistance wire.

If you mean the resistance wire from the ignition I eliminated that a long time ago when I installed pertronix on the old engine. Please tell me if you mean something else.

Originally Posted by randyr

If you mean the resistance wire from the ignition I eliminated that a long time ago when I installed pertronix on the old engine. Please tell me if you mean something else.

No, that's what I was thinking, but I'm pretty sure you need 12v to the coil and it appears that you're dropping it somewhere.

Originally Posted by randyr

If you mean the resistance wire from the ignition I eliminated that a long time ago when I installed pertronix on the old engine. Please tell me if you mean something else.

Yes, I have full 12V to the coil. It drops to about 9V from coil to distrib.

I've tested the coil per these instructions I found on Stangnet:
to test the coil;

get an Ohm meter and

check primary resistance between Pos and Neg terminals on the coil
resistance should be 0.3 - 1.0 ohms

check secondary resistance between Pos term and coil wire terminal
resistance should be 8000 - 11500 ohms

repeat secondary resistance test between Neg terminal and coil wire terminal
resistance should be 8000 - 11500 ohms

check resistance to each terminal and gound(coil case)
resistance should be infinity

But my readings all come out less than these....e.g. secondary resistance on both pos & neg terminal are at 7000ohms or less and the primary resistance is at 0. There is a spark from the coil to the distributor but it's not a "fat blue spark" like some say it's supposed to be....