87' pickup GM 350 crate swap, won't start

[Plowman]

That seems helpful and discouraging at the same time. It honestly gave me a good chuckle, but the comparisons do seem accurate.

I have watched it while cranking it. It used to just dribble while cranking, then would do a quick spray when it would try to start then immediately stop doing anything. Now after I have replaced the pump they seem to be barely dripping at all compared to the dribble befor and seems even less incline to want to try to start. Although I have been cranking on it much less these days as I have been feeling rather defeated.

Any idea what the issue was that you solved by smacking the injectors? Kinda seems like a "just hit with the bfh" kinda response...

Injectors just not seated fully, clogged, or just not doing what you wanted them to? Admittedly I can't say that I have not wanted to just beat on the thing, although I hadn't thought it could actually help.

 

[midnitewarya]

That seems helpful and discouraging at the same time. It honestly gave me a good chuckle, but the comparisons do seem accurate.

I have watched it while cranking it. It used to just dribble while cranking, then would do a quick spray when it would try to start then immediately stop doing anything. Now after I have replaced the pump they seem to be barely dripping at all compared to the dribble befor and seems even less incline to want to try to start. Although I have been cranking on it much less these days as I have been feeling rather defeated.

Any idea what the issue was that you solved by smacking the injectors? Kinda seems like a "just hit with the bfh" kinda response...

Injectors just not seated fully, clogged, or just not doing what you wanted them to? Admittedly I can't say that I have not wanted to just beat on the thing, although I hadn't thought it could actually help.

Wow, that sounds exactly like what mine were doing...

I believe the issue is inside the injector. There is a metal piston that moves up and down inside a coil, and it sometimes gets stuck and won't move the full distance. I'm thinking this is the case with TBI injectors that have been sitting on shelves for years before we put them in our rides.

I didn't hit them all that hard, and just used a screwdriver. I hit them like you would hit someone's hand with a ruler, if that makes any sense, lol.

If the injectors aren't seated correctly, you'll know right away, fuel will leak everywhere...

 

[Plowman]

Yep that sender. Just wanted to make sure that switch closes, as that powers the fuel pump after it starts

You might check that before seeing that the regulator is okay

How would I go about checking the oil pressure sender to insure it is working? I did remove the sensor from the elbow during install the re teflon taped and installed back in the elbow. It didn't take much to Get it off, and came off my old running motor so I had not been concerned it may have been damaged.

 

[Bent77]

Make sure no continuity at no pressure, and closed with. Then make sure all the wires are good

 

[dyeager535]

How would I go about checking the oil pressure sender to insure it is working? I did remove the sensor from the elbow during install the re teflon taped and installed back in the elbow. It didn't take much to Get it off, and came off my old running motor so I had not been concerned it may have been damaged.

You can also just jumper the oil pressure switch.

You said you've replaced the pump (again?), you should have replaced the hose at the same time.

I dealt with a fairly frustrating barely running/stalling/rough running engine problem for quite some time. Finally got smart and put a fuel pressure tester on it. Running pressure was lower than spec, and pressure dropped off to nothing after the key was shut off. Split hose in the tank. Replaced the hose and problem resolved. The pressure inside the fuel lines held much longer than when the line was split.

Been awhile since I had the TBI regulator apart, perhaps you did put it together incorrectly if you know the hose in the tank is correct. I had to take the one on my Dad's TBI apart multiple times, luckily the TBI gaskets tolerated it without leaking and I just left them in place every time I had to access the regulator.

I don't ever remember hearing noise from the fuel lines.