Don't take them all off. Just the one I have circled in this picture and hold your finger over the rubber line and try reving it to the spot where it usually starts missing. If it makes it run smoother like it does mine, then just get a nice size machine screw and screw it in the vaccum line until the issue is found. It may or may not work for you, there are so many things that could be wrong and causing this issue. Just trying to help because I know your frustration.

 

my cold start injector is not getting power. neither of the wires going to it have power??? I have been playing with the AFM, mostly taking it off and moving the flap and also took off the black plastic cover to see if there was rust or something in it, it looks clean but I wiggled pretty much everything inside it and put it back on and it ran a little better, could it be going bad and still give good resistence readings?

 

sorry to bring this post back from the dead, but I found my problem and fixed it. I wanted to post it up so others may find it useful.
My engine would jerk and sputter under any throttle, I finally checked the fuel pump, the tank had about 2" of gunk, rust, and ???? in the bottom of it, and was clogging the pump pickup. I took it off and cleaned the tank and replaced the pickup and the truck runs great now!

 

hey ,glad that worked out for you. good troubleshooting,these truck suck to try and check fuel pressure on due to having the have the banjo fitting adapter.