88 s10 new pump and injector. No fuel

Your problems seems intermittent, the fact you changed the TB has/had little effect. You need to have a scan, to what trouble codes exist...if any. And yes, all of these type problems are/can be tough for the pro's, so if you aren't familiar with the system, its nearly impossible to guess.

and you'll be telling the buyer all these troubles you've had right ? Or are you going to just unload it ?

@beatupchevy well I'm not "that guy". I wouldn't do that. Not to mention it's a friend. But he knew that I needed to replace the injector, or so I thought since it fixed the problem previously, which is not the case now. I would really like to know the issue for sure so I can at least inform him properly or fix it.

check for loose/broken vacuum lines , pin holes in rotted fuel lines

@beatupchevy I know I have a few small vacuum leaks. But why would that cause the fuel pump to be inop.? My next step is to change the relay on the inner fender. Also idk if this helps but it runs when I pour gas in the intake but only until it's burnt up. So I'm just having a fuel supply issue. I know we can buy bad parts sometimes, but what's the odds I bought a bad fuel pump AND TB injector? That's what has me confused. The injector immediately fixed the problem before. Now it seems like it's the pump this time. So confused. (Also I'm not sure I'm replying to answers the right way but hisnis the only way I know how)

is the fuel pump in the tank ? make sure it has a good ground , . if it's on the motor and you have a hole in the line where it goes over the rear axle it won't leak it'll just suck more air , the injector should be spitting fuel when cranking

@beatupchevy it's in the tank. I checked the ground last night but I'll try taking it off and cleaning the frame where it's mounted. I'm pretty sure it's not even turning on during first initial purge. But I was by myself and wasn't able to get close enough to know for sure and still hit the key. Also before, when the new(used) tb injector fixed the issue, it was getting fuel up to the injector. I cracked the inlet line and had plenty of fuel. But nothing ever came out of the injector. Which is why I pretty well narrowed it down to that injector and it worked...for 4 days. No I have 0 fuel coming out of the fuel inlet. Could I be shortin out somewhere?

you''ll need a multi tester to trace it

I have had this same problem on my 1988 2.5 s-10 .Fuel pump is good. Fuel filter is new. Checked fuel pressure with gauge and was perfect. Fuel would go to throttle body but would not come out of the injector.Installed a new injector and still no start. Attached a noid light to the plug in at the top of the injector and it would come on bright then go out. Was told could be the ignition control module. I took the dist. cap off to replace it and felt around the back of the distributor where all the wires go into the plug in for the ignition module and saw a broken wire that was under the other wires.I attached it to the location where it looked like it came from. I put the cap back on and did not replace the module. I turned the key on it fired right up and has never run better. I can only assume this wire had been grounding everything out on a random basis .Like someone said "If it takes longer than 5 minutes it's something simple" which was certainly true in my case. My suggestion is to feel around the back of the dist. for loose or broken wires. I hope this saves somebody some time.

Pick up tube fell off of fuel pump...common problem if your not getting fuel at the engine. Pull sending unit and ill bet ya supply line fell off of pump....do you hear gas gurgling back into tank after cranking?? If so, this is your fix.