1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT

[PlayingWithTBI]

1228747 ECM and "AKWA" PROM chip.

FYI - AKWA is for a 5.7L Auto trans (TH400). Here's some info including wiring diagrams.

1228747 ECM Information $4F

1228747 ECM Information $4F This ECM was used in 89-90 Chevy trucks with manual and turbo 400 trans. Click here for details on how to read error codes known as Check Engine Light (CEL) or Service Engine Soon (SES) can be found in this thread. *Work in progress*

www.gearhead-efi.com

 

[evilunclegrimace]

The ECM I have has an LMNW prom in it. I have another unit here some where that was out of a P-30 Chassis. I will keep looking.