Have a 2002 S-10 Blazer, 4.3 motor, that started running like it had water in gas then just wouldn't start. Unhooked battery to reset codes and ran purfect. Turn off and went to restart and went back to dead. Back fires through carb(T/B) and while turning over seems like motor is real tight, like timming is off. Thanks for any help.

Sorry I didn't see this sooner.
Did you get it fixed?
If so, what was the problem?
If not, what have your tried to date?