Originally Posted By RapidRobert
Originally Posted By grancuda
I swapped that one for another while at the local parts house & the second one didn't work either. It ended up being the pin diameter on the ignition module. They are too small around & don't make a connection to the connector on 2 of the 4 pins. You could see where the other 2 slid on the terminal but the other 2 made no marks in it. Took a dial caliper & the new ones were slightly smaller.

Going to order a Mopar Performance unit & try it.
I never woulda guessed! I learned something today. I thought something was fishy that the new ECU did not work (I mean it was a simple plug and play deal). EDIT get a chrome one, not an orange (or faster yet go back to your parts house & take your calipers with you)


I never would have guessed either. The guy that runs the parts house called a tech line they have & was on the phone for 15 minutes or so discussing what was going on & it was one of the things they had as a potential issue for a unit that tests good but doesn't work in the vehicle. I was skeptical when he said that then I took it out to the truck & popped mine off & sure enough, my original had larger pins.

Last edited by grancuda; 07/09/16 01:51 AM.
1967 Barracuda Formula S 383
1967 Chevy C10 Short Stepper
1980 Macho Power Wagon LWB 318
2021 Toyota Supra