1994 4.3 TBI ECM wiring diagram
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Senior Member
Joined: Apr 2010
Posts: 752
From: Nebraska
1994 4.3 TBI ECM wiring diagram
I've really got myself into a mess this time. I'm in the process of converting the ECM in one of my other cars to a faster ECM out of a 1994 S10 pickup with the TBI fuel injection. I used the pinout/diagram from a "similar" ECM but I am only throwing a 'Service Engine Light' upon powerup.
If anyone has a Chilton or some other manual that contains any wiring diagrams I would appriciate it. I just want to double check my wiring.
If that checks out I suppose I'm down to the junk-yard ECM being bad or that the tune I loaded is not compatable.
If anyone has a Chilton or some other manual that contains any wiring diagrams I would appriciate it. I just want to double check my wiring.
If that checks out I suppose I'm down to the junk-yard ECM being bad or that the tune I loaded is not compatable.
Starting Member
Joined: Jul 2010
Posts: 123
ecm
see if this pinout is different....from what i understand of the whole system, the firmware has to be compatable with the PCM & Transmission mod in order for the ECM to work right.....i think...
...good luck
ftp://ftp.diy-efi.org/pub/gmecm/manu...47/747ecm1.jpg
...good luckftp://ftp.diy-efi.org/pub/gmecm/manu...47/747ecm1.jpg
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