My ka24de is breaking up around 3000 rpm. Does anyone know whats the matter. Help.

 

What do you mean breaking up?
misfire?
sounds like its redlining?

Can you be more descriptive?

 

it breaks up around 3000rpms, the motor is all stock xcept for no cat or exhaust after the cat. could it b the o2 sensot getting a bad readin, and putting it into limp mode? or possibly a bad ecu??
the car was running great then all of a sudded this started happening. really frustrating! any help would greatly be appreciated.

 

Try cleaning your MAF

 

I put a newer maf on and it still does it. After taking it down my half mile driveway once it ran ok. then the second time it started breaking up at any rpm. THe breaking up sounds like a rev limiter thats un predictable. I dont understand it.