1996 S10 4.3 Cranks, no start, tiny shot of ether and fires right up. After engine starts runs great no codes. after truck sits for a half hour same problem. Fuel pump kicks on and no codes are popping up. What do you think fuel line o-ring bad somewhere??? Anyone Had this problem before?????

 

your fuel pump could be getting weak. also u can try changing your fuel filter.

 

check map sensor too it variable hopefully you want be throwing parts at it like i did.