i ordered an ECM from ebay 1227169 which matches my cars number (its LG4 carbed). im putting it in my 86 Firebird and want to know is it plug and play? i noticed when i went to autozone.com for a reman i have to transfer the proms/calpack???

what is a prom? how do i get it out? do i have to do that to the one thats coming? its a used OEM unit

also why cant i find any schematic for this ECM? i want to locate the ground pins so i can test them

 

anybody?..

 

The prom is the larger chip, the calpak is the Smaller chip for limp home mode .
To remove they pull out, watch the orientation they will only go back one way.

http://www.austinthirdgen.org/index.php?pid=19

 

will they have to be swapped when the other one arrives?

its a used OEM computer

 

Yes, unless it's from the same application.

 

the one ordered has the same FFA code, same service number, 868241. only number different is the one the starts with "M" all other numbers are the same

 

Since the prom has the same broadcast code of ffa. You can just install the ecm.
The ffa is the code for a 86 lg4, 700r4 computer controlled carburetor.

 

which one is the Calpak? i got the PROM out but the one with the bar code is soldered to the board