Hi i have done a check on code on my 97 P reg wrx and it is showing maf circuit fault so ive got a new maf which is orange which is apparently what it should have but ive still got the fault so could be the wrong maf my original maf had no label on so im unsure what one it should be now the 2 mafs are the same size but the 1 that was in is all black where the orange maf has orange inside.
can anybody help?

 

Have you disconnected the battery for a coulpe of hours to reset the ecu to clear the previous logs?


Simon

 

yes ive reset the ecu and still comes up the same fault of code 22

 

Is your replacement maf a genuine one and is it BRAND NEW,have seen many times people use second hand parts with problems.

 

What was it doing on your old one? cutting out?

 

with both the revs seem hesitant when first reved and on a test drive when it feels the turbo should be pulling it feels to be holding back.
the replacement is a used item but giving the same symptoms altho running on the orange maf standing still seems to rev better

 

Have you cleaned the boost solenoid? Checked coil packs?

 

Code 22 is knock sensor, not MAF.

 

it has both codes coming up but ill deal with the knock after sort the maf out

 

With the knock sensor out, the ECU can't learn. After a reset, the car runs its default setting for the IAM, which means it won't run cleanly at high revs and under load.

It is very difficult to know whether the problem you are seeing is caused by the MAF or the lack of knock learning in the ECU.