i've had a flat spot at 2500-3000 revs, gets worst towards the 3000 mark.
its never really been too bad, lately its been getting worst... starting to missfire
spark plugs seem ok'ish how ever there denso TRD IK24 'are these running too cold'
the engine isnt highly modified, just induction kit, manifold ect...
i've read that the rs200 uses IK20, should i try a IK22??
thanks in advance