No power at high speeds

Check your belts and pulleys. Belts should not be cracked and pulleys should turn freely with no noise.

It sounds like the clutch is slipping, requiring a new clutch.

Sounds like a vac leak, could be the power brake booster or a hose.

Sounds like a leaking master or slave for the clutch that is not permitting full disengagement. If it only happens when cold it could also be caused by incorrect lube (too heavy) in the transmission, but that is unusual.
Make sure the fluid in the clutch master cylinder is full and that there is no visible seepage where the rod enters from the pedal and that there also is no seepage at the slave unit.

few possible problems come to mind but the first being leaking injectors

to confirm...
try pushing and holding the accelerator all the way to floor when you try to start for the first time in the morning

be prepared to release the accelerator if the vehicle starts

Have you had fuel pressure tested, and/or filter changed. Have you checked for plugged exhaust, such as catalytic converter? Quite often engine will also run a little hotter than normal when exhaust is plugged.

Pull the plugs and compare them to the pictures in repair manual, ie: Chilton's or Hayne's. May be a bad injector flooding them or an intake leak causing a lean condition.

doesnt sound like the fuel pump!!
more like a bad body ground!!!!!!1

shift tranny from 1st-3rd if engine revs up clutch needs replacing

check the ground wirea at the dipstick tube,remove them all,and bend the ends of the wire,look for weak or broken wires, i bought several 4 cyl jeep that had problems at shift, fall on their face < after the engine settled back in to place,so wires made contact> just a thot. the ground wires are small the engine moves,when shifting.