missing at high rpm
 

hello to all.guys i have a problem and need help.i have a 03 rx8,AT.it hesitates once or twice on the way to redline.ihave replaced plugs,plug wires and original mazda coils(100b).as a set and have driven it about 100km on the new set.i have also put in a new air filter,change oil and filter after 2500km. the car is driven48000km.i do not know what else to do .pls help.

did you check the Catalytic converter?

no.what should i do with it.the place where i live does not have any mechanics servicing mazda vehicles.in fact i think there is no mazda dealer in our country.the plugs,wires and coils i got from the states through a cousin.

sorry forgot to add the in the old set the exhaust tip would be black after a good run but after putting in the new set there is a brownish residue in the exhaust.the acceleration is better and it will pull to the redline.this problem is an on and off thing.
thanks

Clean the MAF.

You will retain the Cel code unless you re-set it.

Res-set the ECU

and resets the NVRAM since youve been driving with the misfires they may be "learned" to be expected by the e-shaft sensor.

kevin.

i think this' learned' thing is was the problem b/c after driving it for a couple of 100km the missing has gone.its fine now.thanks for taking the to