- Joined
- Dec 28, 2014
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- Location
- Washington Twp. Mi
- My Car
- 1972 Mach 1 Q Code
Hey guys I’m having electrical problems with my 72 Mach1 with a recently rebuilt 351 Cleveland. I have tried to look the up with the search but I can’t figure out what is going on. My car is very clean and restored. It has an electronic VR, which isn’t very old and I have the pertronix I for the ignition.
So when I turn the key to the off position it continues to run like normal, not dieseling. It doesn’t do it all the time, but is becoming more frequent. I can tell when it’s not going to shut down cause my factory tach quits working. I did find a bad connection at the I terminal of the starter relay, but I fixed that and I got the same thing.
I removed the wire from the I terminal of the relay while it was still running, thought it would shut down but it didn’t. So then I looked at my tach and it was working again and I turned the key to the off position and it shut down.
I can start the car with the I terminal disconnected and it will keep running. I checked the voltage and I get 5.3 at the coil positive with engine off in the run position and 3.8 when engine is running. Now that’s with me touching the ground to the coil ground.
Sorry if I’m not trying or testing the correct stuff but I’m pretty confused about what is wrong.
Now I just connected the I terminal back up and started the engine. Tach is working and I shut it off and back on a few times. I have some kind of intermittent connection happening. So anyway I sure could use some help! Thanks.
So when I turn the key to the off position it continues to run like normal, not dieseling. It doesn’t do it all the time, but is becoming more frequent. I can tell when it’s not going to shut down cause my factory tach quits working. I did find a bad connection at the I terminal of the starter relay, but I fixed that and I got the same thing.
I removed the wire from the I terminal of the relay while it was still running, thought it would shut down but it didn’t. So then I looked at my tach and it was working again and I turned the key to the off position and it shut down.
I can start the car with the I terminal disconnected and it will keep running. I checked the voltage and I get 5.3 at the coil positive with engine off in the run position and 3.8 when engine is running. Now that’s with me touching the ground to the coil ground.
Sorry if I’m not trying or testing the correct stuff but I’m pretty confused about what is wrong.
Now I just connected the I terminal back up and started the engine. Tach is working and I shut it off and back on a few times. I have some kind of intermittent connection happening. So anyway I sure could use some help! Thanks.