When I accelerate in my manual 02 accent the engine over revs but i don't move very fast. what could be causing this?

1. Worn clutch: If the clutch is worn, it may not be disengaging properly when you change gears, causing the engine to continue to rev as if you were still accelerating. This can also cause difficulty shifting gears or a slipping feeling when accelerating.
2. Dirty or faulty throttle body: The throttle body controls the amount of air entering the engine and adjusts the idle speed. If it's dirty or faulty, it may not be closing properly after you release the accelerator pedal, causing the engine to continue to rev.
3. Vacuum leak: A vacuum leak can cause the engine to rev excessively or idle roughly. The leak can be caused by a cracked or disconnected vacuum hose, or a malfunctioning intake manifold gasket.
4. Faulty idle air control valve: The idle air control valve regulates the engine's idle speed. If it's faulty, it may not be closing properly after you release the accelerator pedal, causing the engine to continue to rev.

The previous owner used to be a real driver and the Blazer missis him.

Check and make sure the catalic converter is not blocked, its a common problem on accents.

Whats alot of carbon, if it reaaly bad you might want to remove intake manifold and clean it, or if its not to bad run engine at 1500 revs and spray nulon carby cleaner in slowly to clean it out.

I have same problem. It is the purge valve associated with emissions system

you may have a dirty fuel filter or the throttle plate may need cleaning.the throttle plate is the valve that moves in the intake when you move the gas pedal.if they get too dirty they cause a restriction in the intake and cause the car to stall.it also could be a tps sensor problem but this should put the check engine light on but not always.the breaking up of the motor when you rev it to 4000 rpm`s is the rev limiter in the computer that shuts down the firing of the plugs and injecotrs so you don`t cause damage to the motor when there is no load on it.

did you change the filter,(it may be plugged) doese it have fuel...is the new pump alligned in the right direction(pumping fuel to the engine/pumping fuel to the tank)

Your gas tank must of been crushed,in some kind of offroad incident because if you can't fill it up the filler tube must be kinked.Or the pollution system is faulty such as the purge valve or vapor canister.

Try a throttle position sensor. joe b, huyndai tech

I have the same problem as talked about above. 2002 Hyundai accent gsi. HORRIBLE gas mileage. I only get about 320 km per full tank. My driving habits are good. i took it to the garage and they put it on the computer and no error codes showed up. Question: Can a MAP sensor be faulty but NOT show up on the computer diagnostic? I had my O2 sensor checked out and my exhaust, and changed the flex pipe. Car runs pretty good just horrible gas mileage and kinda crappy power. Changed fuel and air filter. Cleaned the fuel system entirely ($80 at garage not $4 bottle).

Anyone ever use a resistor in the MAP sensor?

Could be bad motor mounts, does your motor rock back and forth a lot when you rev it.