iv just realised today that when i rev my car to 2000rpm on standstill, my CEL light comes on and it idles rough til i let go of accelerator, and the CEL will also disapear.

Also when im driving , itl kind of jerk between 1000rpm - 2000rpm but no CEL comes on.

What could that be ?

 

u need to post more info.what car do u drive would be a good start?

 

I have a V1 wrx sti
full decat
decat dwnpipe
decat manifold up pipe
blitz Induction kit
td05 turbo
prova ecu