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What should my fuel trims be at ?

Posted: Wed Jul 01, 2020 8:22 am
by alex_hockey69
Iv been running +6psi set up and my long term fuel trims are over -10 is this normal ?
Here in Montreal Canada it's around 30 degree Celsius with a lot of humility does this cause the fuel trims to be like this ? In the winter long term trims would be +1 - -1 long term. I have the factory Intake on . I used the K&N Red Typhoon short Air Intake System and was getting the same fuel trims in summer and winter. Even calibrating my MAF for months going though this problem I guess I could say it would not change, I am guessing it is because of the hot weather here. I am planning on putting back the K&N air intake on because I love the sound that comes from it and if I am getting the same fuel trims why should I brake my head trying to rescale my MAF again when it changes nothing with my fuel trims. No matter what I try stock air filter or the k&n my long term will always be high negatives.

Re: What should my fuel trims be at ?

Posted: Wed Jul 01, 2020 2:26 pm
by Hondata
Please post a datalog.

Re: What should my fuel trims be at ?

Posted: Thu Jul 02, 2020 8:07 am
by alex_hockey69
in the datalog.. stock intake, +6psi fts, outdoor temperate 33c

Re: What should my fuel trims be at ?

Posted: Thu Jul 02, 2020 8:24 am
by Hondata
The fuel trims are strongly negative. There is some sort of problem, probably with the AFM reading.

Re: What should my fuel trims be at ?

Posted: Thu Jul 02, 2020 8:41 am
by alex_hockey69
What should I be looking at ?
The MAP sensor looks clean. New air filter also.
I think I will return the car to stock and do a data log