New air idle control valve, rebuilt distributor, plugs and wires, fuel pump assembly, icm, and tps. My truck still struggles to hold idle and just wants to die, there is so little power I can’t even crawl in granny low when is does idle it runs like there are several cylinders missing I’m scratching my head on it fuel pressure at 40 psi while warming up and 35 when at operating temperature.... not sure if that’s too high?

 

It would help if you listed the year.

 

Can we ask if the problem was this bad before replacing the dist. ?
If the dist is one tooth off, engine will not run right even though it will run.
Also , when you replaced the cap, if you did, do you have the correct firing order?