Quote:
Originally Posted by steve99
P2270 is not a "normal " code you would expect from removing a cat.
https://www.obd-codes.com/p2270
That code indicares you have a real problem like exhaist leak or bad o2 sensor or incoreectly installed front 02 sensor and it constantly reading lean afr.
If you getting that code you would also expect to see high positive fuel trims.
P0420 is the code for cat efficiency.
Post up a log of tune
With parameters below cruise idle and a wot run to redline
V4 tune iam intial is set to 0.7 so each time car stopped it resets to 0.7
Engine Speed (rpm)
Throttle (percent)
MAF Voltage (volts)
Engine Load (g/rev)
Ignition Advance / Total Timing (degrees)
AFR
Commanded AFR / Target AFR
STFT (percent)
LTFT (percent)
Oil Temp (F)
CL/OL / Fuel Sys Status (2 = CL, 4 = OL)
IAT / Intake Air Temp (F)
IAM / Ignition Advance Multiplier
FLKC / Fine Learning Knock Correction (degrees) |
well I win dumbass of the day award. Looks like when I first installed my UEL headers I put in a o2 spacer on the rear o2 bung to try to drive a bit on the stock tune. I never went back and removed it after using the OFT. Haven't tested yet but I'm sure that's the culprit. Also looks like there is a v4.03 for k00c now so I will load that in too.
I'm used to corvette world where we just tune out or turn off the rear o2 sensors and you can leave them in or take them out. Looks like on these cars they must still serve another function besides checking for a cat efficiency correct me if I'm wrong.
Thank you everyone for steering me in the right direction