The check engine light on in my 1994 4x4 S-10 4.3 w auto and I've read conflictive reports about using a jumper (a paperclip) because the 94/95 models were different. The connector on mine is of the 12 pin design. The engine starts fine but idles rough. An Actron CP9145 scanner supposedly works but I can't find one. So if any 1994 owners have info on this I would appreciate your replies.

 

12 pin is correct for chevy pre-odb II connector. If this works. The link below shows you both types and you jump B & A with ignition off. Then turn on but don't start. Then the check engine light should flash a code.


https://search.yahoo.com/search;_ylt...yfp-t-901&fp=1


Josh

 

It'll work.my 94 did. Top far right 2 prongs. Dont start it with the clip in.