92 D21 Hardbody Pickup (KA24E) Fuel/Timing Problems?

[Minnyman]

Not sure what my problem is, so here is what ive found so far>

Im in AUstin, TX and its just recently started getting chilly.145000 miles on this truck.

Replaced timing belt/sprockets etc, ran good for about 2 months, although the idle was a bit too high 1200 or so.

Got around to the idle speed, dropped it down to 800 set timing to 10 degrees again, it ran good for about 2 days then started stumbling when accelerating, light black smoke from the exhaust, idles rough, and wont start up when warm.

Ive been trying to set the timing again but it doesnt seem to help and when I try to turn down the idle(back up to like 1300) again it starts to die around 900.

Occasionally when trying to do the timing it will just rev up to like 1400 rpm and stay that way untill i pump the gas a little. Also the timing jumps to like 40 degrees or so.

Thought it might be a fuel problem because when its warm and wont start I can pull the fuel pump fuse and it starts right up then dies due to the fuel pump being off, but if I try it with the fuse back in it wont start.

Today I pulled the filter and drained it into a bottle, fuel was crystal clear, also tried blowing into the return hose and this is where the wierdness happened, after I blew into it fuel came gushing out of it, I didnt know what to do so I just watched it untill it died down and quickly put it back on the exit end of the fuel pressure regulator.

Could the pressure be too low or too high, gunk in tank, etc. I have no idea, not even sure if its a fuel problem.

After i get my motorcycle running ill test the pressure with a gauge, gotta get the morning ride to work running first though, lol.

any help would be greatly appreciated.

Thanks