The first possibility is the fuel pump. The other problem may be that the vacuum hose has came off this would cause a substantial loss of power as well.
gravity
Its a Ford, that's the problem,
I have an 88 EFI truck and it loses speed (not necessarily power) going up hills because it is a manual transmission and it is geared low... and also if you are in higher altitude. Mountains ect..the electronic fuel injection may need to be redone.
cat converter is getting plugged
If a 2000 Jeep Wrangler suddenly loses power in 5th gear, it might be a problem with the speed sensor on the transmission. This sensor regulates when the Jeep will shift or should shift.
It is entirely possible that your clutch needs replacing. In a vehicle that age, your clutch is probably very worn out.
this can be caused by , bad plugs, bad coil, dirt in the fuel system or timing could be wrong
NO
No, the maple is deciduous, as it loses its leaves going into winter.
That is a word, so it is spelled correctly if that is the word you are going for.
It loses power because going uphill is harder then going downhill therefore causing it to use more gas and then making it lose power bit by bit.
If your 99 Chevy Suburban runs smooth, but going up hills it loses almost all of its power and only goes 40 to 50 miles per hour, check the distributor. The cap might be broken or cracked.