When I floor the pedal in my car it doesnt give any different a response then pushing it down halfway. Also the rpms don't go over about 35000. It seems to idle fine. Could this be a dirty throttle body?

What make/mode/year?

I dunno man, I'd be pretty happy with that.

At least give us something to work with... Year, make, and model?

Oh noz, my rpm's don't even go over 33000!

Well it's not from Japan..

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OP I don't have a suggestion other than the possibilty that you car has been set up like that. If it has a mechinal throttle it could have been changed so that the ar could not be driven the shit out of by some guys new-to-driving son.

3,500 RPM.

Anyhow, a dirty throttle body will only effect the Idle, not wide open/part throttle operation.

Model/Make/Year/Engine?

Does it fluff when it gets to 3500 or does it just not run any higher? If it fluffs or runs really lumpy it could be a fuel supply problem - you can check your pump, fuel lines and carbs/injectors. It could also be an ignition problem - the advance on the ignition doesn't keep up with the engine speed (this is unlikely on a modern car with electronic ignition).

Unless you can hear the engine bouncing off of the rev limiter, I doubt the car is set up to only run to 3500rpm.

What I meant by that was that at some stage during the car's life the throttle was adjusted so that the cable could only pull so much, which would be like have excess throttle cable. This only works with mechanical controlled throttles like the ones on carbed engines, as far as I know.
Co-oincidentally one of the first things I did one of my first cars (clutch when I was learning to drive) was adjust the throttle so that it would NOT go low enough to stall easily. I was young as shit at the time and didn't realise that this could be dangerous.
I've also adjusted one of my motorbikes, a classic Enduro bike (Suzuki PE175) so that it ran 1/3 throttle at "idle". I also ran Aviation fuel and full synthetic car oil, chopped the mudguards down, and it had a full floater swing arm. Yes I fucked around with it. I adjusted that bike when inexperienced riders wer going to ride it, so that there was much more throttle cable than you could twist. Because I didn't want inexperienced people hitting the throttle and ending up pinned between a "cast iron" dirtbike and tree.

Whoa, sorry, I was really tired when i first posted this. It is an 88 nissan 300zx. Its fine until it hits about 45 mph then it just caps at about 2500-3000 rpms but it runs smooth and steady no lumps. When it reaches about 65 the rpms go higher and the accerleration picks up a bit. Today i changed the fuel filter and poured some fuel injector cleaner into the gas tank anyway. Also I noticed the overdrive switch isn't working.