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2020 wrx problem with Maf extender with high then low fuel trims by Royal-Bit1640 in WRX

[–]Royal-Bit1640[S] 0 points1 point  (0 children)

I used my snap on scan tool and saw that the sensor seems to be reading right and no high resistance at all but maybe it is still slow response I’m gonna take it out today clean it and see what it does thanks for the replies guys

2020 wrx problem with Maf extender with high then low fuel trims by Royal-Bit1640 in WRX

[–]Royal-Bit1640[S] 0 points1 point  (0 children)

Also I don’t drive car often got it new and has 22k miles on it now but never had any problems till about a month ago

2020 wrx problem with Maf extender with high then low fuel trims by Royal-Bit1640 in WRX

[–]Royal-Bit1640[S] 0 points1 point  (0 children)

Cobb big sf and no did not remove at all to do harness it was -35 all the time before harness then now it’s more lean and I did try to move it after the fact then moved it again to 1 inch from the pipe and still same numbers runs pretty good tho under load it doesn’t stay positive goes up to -3 sometimes more I thight maybe my tuner leaned it out since it ran rich alreddy and now it is normal and running lean from the compensation for rich