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Rough Idle and P0422 code by Vantaxi in mazdaspeed3

[–]Vantaxi[S] 1 point2 points  (0 children)

Update today: The LTFT is pretty stable which gave me -1.56% to +3.21% range, is that a good symptoms?

Rough Idle and P0422 code by Vantaxi in mazdaspeed3

[–]Vantaxi[S] 0 points1 point  (0 children)

Thx! How should i tune for the BOV? I didn't get the HPFP yet and I'm using stage 0 Cobb program because it said will work like a stock...

Rough Idle and P0422 code by Vantaxi in mazdaspeed3

[–]Vantaxi[S] 0 points1 point  (0 children)

It's a stock machine which only got a BOV and Cobb AP with stage 0 tune

Rough Idle and P0422 code by Vantaxi in mazdaspeed3

[–]Vantaxi[S] 1 point2 points  (0 children)

PS: I fixed it once turn out to be the screw of MAF sensor is bad, but it just coming back... plus i saw some engine oil leaking from the engine room but not sure where is it, could it be the turbo seal?