Kokomo:


Hey bro, I change where I buy fuel but I still get high negatve fuel trim

Why not check your MAF. In my case I used to have LTFT of - 25 to - 35 while STFT is always between - 0.8 to 1.6 throwing p0172. Cleaned the MAF and changed the MAF connector, my LTFT dropped to - 7.0% while STFT remained 0.8 to 1.6. Car is a Camry 09

Op How far about your issue on LTFT & STFT? If resolve, how do achieve the solution ?

calculation:
Op How far about your issue on LTFT & STFT? If resolve, how do achieve the solution ?

I live with it

Kokomo:
Car Honda civic 2008

High Negative Short term and Long term fuel trim All the time, Edakun help me

But because the longterm native fuel trim hasn't crossed -25%, my ECU is yet to set a p0172 code, but my fuel consumption had been bad affected, before I do 34mpg average, now I do roughly 26mpg, same route to work

First things first, your idle rpm is too high.

What work did you do on the car?

I have same problem , high fuel consumption, my readin is different thou , honda accord 2000 4 plug auto

Any solution to this high fuel consumption, spark plug has been changed , injector serviced , change cold start , but the new one makes the vehichle sluggish alot , return the old one and vehicle moves ohk again , rpm at idle is largely unstable sometimes coming down to almost switching off and sometimes goes high at 1500 rpm

femarse:
I have same problem , high fuel consumption, my readin is different thou , honda accord 2000 4 plug auto

Any solution to this high fuel consumption, spark plug has been changed , injector serviced , change cold start , but the new one makes the vehichle sluggish alot , return the old one and vehicle moves ohk again , rpm at idle is largely unstable sometimes coming down to almost switching off and sometimes goes high at 1500 rpm

You might have a leak along your intake