I have been running the upgrade on my 289 powered 5 for almost a year with no trouble. I built a fan shroud for the jeep and when I was finished I pulled the coil wire off the coil so the jeep would not start. Just to make sure nothing was going to rub. When I cranked it over the coil spark went to the mounting bracket (ground). I replaced the wire and the jeep would not start , After some troubleshooting I found the module was bad. I replaced it and the jeep runs great. Can anyone tell me why this happened or is it something that I have wired wrong?
I pulled the coil wire out of the coil, the wire did not arc, the coil fired a spark to the mounting bracket. I have done this on other trucks I have owned and it did not hurt the modules. The spark did go to ground through the bracket, I did replace the module and the jeep runs fine. I just thought it was strange that it would fry the module.
For some reason the Jeep modules must be more sensitive than others. I had a short under the dash that took out my module.
If it ran for 5 years with no problem before this, I would say the coil arc to ground caused the module failure.