Blazer will run fine , sputter a bit shut down and fire right back up while driving. Cel was on since i purchased, but after tryimg to fix the issue it has came off. Pulled codes for bad vac and tps. Fixed both and while i wad in there went for the new spider injectors. Had some solid life! For a couple days. It definately runs smoother but thinking the next step may be the fuel pump itself? Possibly explains the random cutout? If it is the pump, a new one online runs 60 while oreillys gets 300plus for one. From what ive been hearing even the good ones are crap? Whats the best way to find if it is the fuel pump?

 

Do a search on fuel pressure or fuel pump and you will find the pressure readings that are needed.

 

The pressures were low, 45 when supposed to be in the 60s. Went ahead and put the new pump in. Still having the same issue. Bought a filter, hoping that might be an issue too but makes sense to leave the old one in for now, maybe catch some of the crap from dropping the tank. Hopefully that resolves it? Not sure where to go next if it doesnt

 

If the truck continues to shut off then start back up while driving, you may have a bad ignition switch.

https://blazerforum.com/forum/articl...-switch-33465/