91 3vze losing power on any slight incline

Hi just joined the forum and I'm hoping someone can help point me in the right direction. Rough idle and acceleration, losing power on any slight incline, about 5mph and hard starting cold. Timing is good, New plugs, wires, cap, rotor, coil and fuel filter. Please help!

 

check for codes, sounds like a TPS issue?
could be running on just 5 cylinders to?
vacuum gauge will tell you, if the engine is misfiring and lots of other issues.
there only 9 bucks too. always 97% electrical

 

also, im thinking temperature sensor, I would try that first .
you can get them at rock auto for under 10.00, get a good one.
OEM SPEC's or better.
the computer relies on the temp sensor a lot.
my truck once, would crank till the battery was about dead then it started.
it was the cold start timing switch/sensor
you don't see them as they are one the back of the engine.