PROM change
Thread Starter
Drifting
Joined: May 2020
Posts: 1,663
Likes: 702
From: Baton Rouge, Louisiana, metro area
PROM change
Has anyone actually, physically swapped a PROM in a 1984 ECM before?
I am probably going to be doing it soon and was hoping for insight/tips/cautions/don’t-do-this’es/etc before I start.
I am probably going to be doing it soon and was hoping for insight/tips/cautions/don’t-do-this’es/etc before I start.
Pro
Joined: Aug 2020
Posts: 647
Likes: 126
From: Liliha Bakery stuffing my face with coco puffs!
I haven't but it's like any other TBI ECM from the late 80's. To prevent any static electricity, hang onto the ECM case at all times while removing and installing the PROM, however I've never smoked one before. Before you begin take note of the notch and it's orientation (use a sharpie if you have to) on the plastic PROM carrier, the PROM inside the carrier will also have a little half moon on the same end. It's actually keyed to go in only 1 way. There's a tool that attaches and you pull it out but I've always just gently pried one side back and forth until it comes lose. Installing, line up and firmly press into place. When ready to start the car, key on engine off and observe check engine light. A rapid blinking will indicate that it's not installed correctly.
Thread Starter
Drifting
Joined: May 2020
Posts: 1,663
Likes: 702
From: Baton Rouge, Louisiana, metro area
Thanks
Good info. It doesn’t sound complicated, but those are always famous last words.
I will pay special attention to those notches to get it in the right way.
thank you.
I will pay special attention to those notches to get it in the right way.
thank you.
