Help diagnose sky high STFT
Thread Starter
Pro
Joined: Mar 2007
Posts: 600
Likes: 11
From: Wilmington NC
Help diagnose sky high STFT
Bank 1 avg is about +35%
Bank 2 avg is about +55%
Bank 2 O2 sensor looks to be about dead (barely reading anything)
This all indicates a very lean condition which is justified slightly by the O2... and I feel the rest could be with VE tables.
I currently run the car with LTFT disabled as it seems to run great.
I would like to fix mechanical issues and then tune VE tables to get LTFT to within 10% and STFT to within 5%.
...and if you're really good, how can I reduce throttle hang when I tap the gas?
I use HP Tuner's software.
Bank 2 avg is about +55%
Bank 2 O2 sensor looks to be about dead (barely reading anything)
This all indicates a very lean condition which is justified slightly by the O2... and I feel the rest could be with VE tables.
I currently run the car with LTFT disabled as it seems to run great.
I would like to fix mechanical issues and then tune VE tables to get LTFT to within 10% and STFT to within 5%.
...and if you're really good, how can I reduce throttle hang when I tap the gas?
I use HP Tuner's software.
Melting Slicks
Joined: Jul 2012
Posts: 2,507
Likes: 9
Why would you disable the LTFT? Do you know (or understand) what these Fuel trims do and how they work?
I think you ought to get your O2's working correctly first, re-enable all the fuel trims, disconnect the battery for a short time to clear all the fuel trims, reconnect and then watch the graphs and see what the car wants to do on it's own.
I think you ought to get your O2's working correctly first, re-enable all the fuel trims, disconnect the battery for a short time to clear all the fuel trims, reconnect and then watch the graphs and see what the car wants to do on it's own.
