93mustang
Hi! New to site here and have a question. Can anyone tell me how to test an ignition box? I have a 76 model AMC 304 with the electronic ignition. Installed a NAPA electronic distributor and ignition mmoduleback in August. I am getting an intermittent fire and sometimes none at all. I have tested the coil and it is good. Can't figure the intermittent fire though and would like to test the amplifier. Thanks in advance!
jeepsr4ever
Usually they just go out. Hmm do you have any splices in your wiring like on the purple wire from the box to the dizzy? Reman'ed dizzy?
93mustang
No splices. The dizzy is a reman. I was also thinking it might be the pick-up in it? Is that what you were eluding too? If so, how would I test for that?
jeepsr4ever
I have was having the same issue with 3 of those last fall...not sure was probly the pickup malfunction.
93mustang
Okay. Thanks. Did you finally get a good one from them or have to go somewhere else?
jeepsr4ever
No after that I never bought from them again. I used a dizzy we had in a wagoneer.
tufcj
In 76-77 they used the Prestolite ignition, in 78 they went to Motorcraft. I had it in my 77 also. Left me stranded at least twice before I junked it and installed the Mallory Unilite.
One thing is ground. The ECU box on the fender MUST have a good ground. Without ground, no spark. Mine quit once when the ground wire broke.
I wouldn't waste a lot of time on the Prestolite, it's junk, that's why AMC quit using it. For what you'll spend for rebuilt parts, you could have a quality aftermarket distributor, and less headaches. You could even convert to Motorcraft by pulling the distributor, ECU, and wiring from a Wagoneer, and splicing it into your system (just 3 or 4 wires).
Bob
tufcj
