Does anybody know where this is located, i pulled a code 42 out of my computer, and i want to know what to do to fix this. I would do a search, but my control panel doesnt seem to have it anymore.

 

Presuming you installed the 1987 ECM with the '87 L98, the ESC should be a separate unit bolted to the firewall accessory bracket near the brake booster:

 

thanks vader i know exactly where that is.

 

well i tried an experiment tonight, i replaced the computer with a 305 tpi computer i had here, and the code disappeared. So i took the memcal out of the 350 computer and then reinstalled it back into the 350 computer, and put it back in the car, and a different code came up. It was code 34, Mass airflow sensor low. Could this actually be a computer problem i am chasing, and not a sensor problem

 

Hello,

Maybe you guys could help me identify the three relays behind the booster on a 90 IROC. Mine are all snaped on one bracket. My car has no maf, it does have a map sensor on the intake. Any help would be awsome. My manuals do not cover theese parts. in advance!!!!

Mark

 

Two are fan relays and the other is the fuel pump relay on the 90.

 

3.8TRANSAM-

MARK