84" Not getting enough fuel during HIGH revs?
 

Thanks for your time. My problem is when I go into drive the car into high revs it's losing power at/around 5000rpm. It's choking like it's not getting enough fuel to the engine and loses power. This is only when I floor the gas though. This is really getting old because I can't pass anyone on the high way and I feel like the problem is getting worse. Also, this problem only occurs in 3rd,4th and 5th gear. I have an 84', 5 speed, 12A 1.1L engine. engine has around 130,000 miles on it. The problem doesn't occur in 1st or 2nd gear. I got one guy to look at it and he said I need a new carburetor and that it's running too lean. With thats said Do you have a different answer for what it might be? and if it is the carburetor then how can I fix it. Still has all stock engine(no mods).
Also just changed the sparkplugs today and still having the same problem so it's not the plugs.

have you checked the catalytic convertor? if its plugged up you wont get any power in high rpms.