Hey everyone,
ive got a 99 sierra 4.3 v6...2wd.. its a reg cab short box, and manual trans as well,
I started it in the morning and drove it fine for about 20 mins to town, putted around a couple plazas to do some stuff then started it in the plaza to go home and when leaving the plaza the truck lost power and was rough idling while i was coasting then just died... couldn't start it after that..my problem is that it wont start... heres a list of stuff that i know:

- sat in the parking lot for 30 mins...
- has 3/4 of a tank of gas with gas line antifreeze in it...
- has fuel flowing right up to the throttle body, i took the line off the throttle body and turned the key on to prime and it came out like a fountain..
- it does turn over... but wont catch..
- if i put gas down the throttle body, it fires right up.. so it has spark
- all fuses are good, none are burnt out..
- i live in Canada.. so it is in the negative temperature wise but i dont think that has anything to do with it.

Ive only had the truck about a month, so im unfamiliar with the engine and its components.. so i leave it to your expertise to help me out... im thinking it might be a sensor or something dumb like that.. its like its not letting the fuel past the throttle body in to the engine..

thanks
Tyler

 

Check fuel pressure. Just because you are getting fuel out of the line doesn't mean you have enough pressure. Also check the fuel pressure regulator.