cranks but no spark at coil
Reviving your thread Steve!
Today I wanted to start my 76 dually. It's a 383 that drove to where it sits.......months ago though.
So I try to start it and low and behold, it acts like no spark. So I searched the forum and went through a few threads. I ended in this one. I thought I was chasing the same symptoms. Anyway, I pulled a plug and sure enough nothing. So as described here, I tested the coil + and - to ground and had power during both start and run. Then I thought OK poor ground on ECU. I removed it and cleaned and ensured there would be a ground. Install......nothing. But I had another ECU that I had dug out and did some tests on both of them prior to this. My "new" one had continuity to ground on the terminal Del has the red lead on in this pic. The old one did not. This must be the negative in the circuit. Installed the new ECU and varoom. It roared to life. I was wondering if the short could be repaired, but that goop in the back kinda says NO! I do have one of those Chrysler ignition testing boxes, but it doesn't work. No power upon hooking up to the battery. :(
Anyway, thanx guys. As usual, FABO solved another Mopar conundrum.
Reviving your thread Steve!
Today I wanted to start my 76 dually. It's a 383 that drove to where it sits.......months ago though.
So I try to start it and low and behold, it acts like no spark. So I searched the forum and went through a few threads. I ended in this one. I thought I was chasing the same symptoms. Anyway, I pulled a plug and sure enough nothing. So as described here, I tested the coil + and - to ground and had power during both start and run. Then I thought OK poor ground on ECU. I removed it and cleaned and ensured there would be a ground. Install......nothing. But I had another ECU that I had dug out and did some tests on both of them prior to this. My "new" one had continuity to ground on the terminal Del has the red lead on in this pic. The old one did not. This must be the negative in the circuit. Installed the new ECU and varoom. It roared to life. I was wondering if the short could be repaired, but that goop in the back kinda says NO! I do have one of those Chrysler ignition testing boxes, but it doesn't work. No power upon hooking up to the battery. :(
Anyway, thanx guys. As usual, FABO solved another Mopar conundrum.
