Sonoma wont start

[Bukaka]

I have a 1991 gmc sonoma with 4.3 and I recently replaced idler pully and no more then a mile after replacement my truck stalled out.  Immediately after replacing pully truck idled weird for a moment so I shut off the engine and restarted the motor. I took it for a test ride around the block and it seemed to be driving great as soon as i pulled back up to the shop the engined stalled out and I could not restart the engine.  It seems like my fuel is being delivered to throttle body as i have replaced fuel pump and i am still having the same problem. The fuel lines have gas at the throttle body and i can hear fuel pump turning on .  if I spray staring fluid it will crank but then it dies.  I dont know if it is bad injectors or if its something else.  About2 weeks ago i installed a throttle body spacer not sure if that has anything to do with this but I drove the truck daily and it was only after the pully install that this issue began. Please help i miss my truck

Edited November 18, 2021 by Bukaka

[asilverblazer]

I bet you accidently unplugged something during the replacement. Carefully check all the wiring in the area, plus near the routing of the serpentine belt. 

 

"if I spray staring fluid it will crank but then it dies.  I dont know if it is bad injectors or if its something else." 

Do you mean it runs on starting fluid but dies when you stop? What happens if you swap the starting fluid with fuel?

 

Why did you replace the fuel pump?