ok this is my third post sorry....
ive been struggling to get my car over 4,00rpm but today I put my old ecu back on reset it and its now running fine but when I put the apexi back on it runs like crud..Is there a valid reason for this (jgm)
Ive replaced a coilpack and o2 sensor

 

anybody had a similar thing

 

have you been playing with the commander?


you can adjust the RPM limit easy enough with it, maybe somebody is playing a trick on you?

 

As Micky says, something on the commander must have altered.. maf setting is common mistake.

Simon

 

how would i check the maf setting or rev limit but im pretty sure its not been touched