moved to wy, no balls

[mach1460]

i recently moved to laramie wyoming, and i used to live in sioux falls sd. I know that sioux falls is alot lower than wyoming casue im basically in the rockies now. My truck (1993 4.0 limited) ran great in sioux falls it had a lot more balls there too. now if im on the interstate i have to mash the petal to the floor to hold 65-70. in sf i could hold 90 with out trying.
i knwo that the air is a lot thinner up here is there anything that anyone know that could help me ou t with this "small balls prob" thanks

 

[EasyRhino]

What's your altitiude difference betwen then and now?

Could go with forced induction, supercharger or turbocharger, that's what piston driven planes do for high altitudes

 

[JDraper]

Try resetting your computer. Disconnect the battery for about 5 minutes and hook it back up. The computer will then "learn" the new air/fuel ratio based upon the thinner atmosphere. This may help your problem.

 

[mattadams]

yeah i was going to recommend resetting the battery... also might want to try a more open MAS or air intake if you can... the altitude does make a huge difference, which is one of the reasons that a lot of drag racers that can do the 1/4 mile in 11 seconds at sea level, take about 13-14 to do it up here.

 

[Robert]

I remember when driving across Wyoming with my GPS I noticed that at least half of the trip was at or above 7000 feet. For every 1000 feet above sea level you go up you need to deduct 3% from your horsepower. At 7000 feet your 160 HP engine is good for 129.3 HP which is about the horsepower of most modern 4 cylinders at sea level.