Help!! Issues
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Intermediate
Joined: Jul 2015
Posts: 26
Likes: 2
Help!! Issues
for some reason my route 02 trim will not match the driver.. something is telling the computer that bank 2 is lean and it's commanding more fuel.. I put my wideband in bank 2 and it's actually not lean it's about perfect between 14.7 and 15.0 at idle.. I have don't continuity test and 3 02sensors I am out of ideas anyone?
Advanced
Joined: Sep 2014
Posts: 85
Likes: 18
From: Valrico FL
for some reason my route 02 trim will not match the driver.. something is telling the computer that bank 2 is lean and it's commanding more fuel.. I put my wideband in bank 2 and it's actually not lean it's about perfect between 14.7 and 15.0 at idle.. I have don't continuity test and 3 02sensors I am out of ideas anyone?
Wish you luck.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 326
From: CA.
St. Jude Donor '13-'14-'15
for some reason my route 02 trim will not match the driver
Don't really understand what you mean by this---
I am guessing that you are getting a far difference in LTFT's from the right and left banks-- Typically the side that is RICH has an exhaust leak--Even a small leak can cause as much as a 12-15% LTFT---Most likely the lean side is the true recording of your fuel trims---
Do you have LT headers ?
You could even have a plugged cat on the lean side or a bad muffler-
It is very rare to have it be a fuel flow problem on the fuel rail from left to right
If you can data log you average 02 voltages on both sides that would help--
Please explain your 1st sentence---
Also at P/T the ECM is constantly correcting the AFR on it's own so you won't get a reading that is askew on the wideband-----I suspect the problem is on the other side---
Don't really understand what you mean by this---
I am guessing that you are getting a far difference in LTFT's from the right and left banks-- Typically the side that is RICH has an exhaust leak--Even a small leak can cause as much as a 12-15% LTFT---Most likely the lean side is the true recording of your fuel trims---
Do you have LT headers ?
You could even have a plugged cat on the lean side or a bad muffler-
It is very rare to have it be a fuel flow problem on the fuel rail from left to right
If you can data log you average 02 voltages on both sides that would help--
Please explain your 1st sentence---
Also at P/T the ECM is constantly correcting the AFR on it's own so you won't get a reading that is askew on the wideband-----I suspect the problem is on the other side---
Last edited by tblu92; Sep 21, 2015 at 02:37 AM.
