white 580 mpem keeps going

[n-mod]

Can anyone tell me why my mpem keeps going out? I had one that wasn't creating spark. When removing the red/black wire spark would work but it wouldn't die. I replaced that one, it worked for about 30 starts on the trailer and then same problem, it wouldn't die at first and now no spark.

Any reason why?

 

[smc0922]

Sounds like you need a new regulator/rectifier.

 

[n-mod]

Damn, I wish I knew that before I put this one in. I have plenty of regulators laying around. Are my MPEM's repairable? I am very good with electronics if I know where to look.

EDIT: I replaced the regulator, now were back to getting spark, but it will not die. Anyway to bypass this to kill it or any fix? Or can I put in a yellow 580 electronics?

 

[smc0922]

Check the kill wire for the ignition coil, a bad connection or bad ground will cause it to not shut off.

 

[n-mod]

I know, I've check it many times, everything but the MPEM seems to check out.

 

[AdamXP800]

Seems there's a short somewhere in the electrical system. I would go through all the wiring.

 

[n-mod]

Can that cause MPEM failure? It doesn't seem like a short would be a likely cause.

 

[AdamXP800]

I highly doubt 2 mpems have gone out that close together. There is an underlying electrical issue going on. Ill wait for some of the pros to chime in. Just give them alittle time.

 

[n-mod]

Thats why I have strong feeling about the regulator being bad, but I don't know maybe some other wiring is bad. The engine was swapped once by the previous owner.

 

[smc0922]

Have you checked all the grounds? If one has a bad connection causing it to pull ground through the mpem circuitry then there's your problem.

 

[n-mod]

okay, I will check them all before I install the new one.