Let's suppose on a standard wrx 01 fully catted each sensor reads one value in % of CO after the first cat in the uppipe and the second reads another diminished value after the second cat in the dp. Now, Suppose I replace the Uppipe cat and I fit a Dp with a sport cat, teorethically maintaining the same reduction in percentage in co ( that is: if before I had 25%(e.g.) of reduction in co emission due to the two cats , now I maintain the same reduction but with evident higher overall co emission). Do you think that in this way a CEL problem ( or worse a lean mode ) could be avoided??

Cheers Caronte

 

anyone ---- John?