Hi everybody.

So I've got my tune pretty much dialled in (so I believe...) and doing some test runs adjusting timing and playing with other minor stuff at the moment. The car runs ok, has some minor shake on idle, but what I have noticed in my logs is that approximately 1min30sec. into driving the short fuel trims on bank1 drop to zero and stay that way until I restart the engine...WTF? Did anybody ever come across this, am I missing a setting in my tune? Also please take a look at the bank1 upstream O2 sensor readings, is that a correct behaviour, this is a brand new BOSCH sensor, previous one did exactly the same thing. Also to exclude spark plugs and coils, I swapped them with bank 2 and that changed nothing.

The spec of my car: 2013 A6 ZL1, has a JLT Big Air intake, LS3 Throttle Body, LS9 camshaft, 2.6 upper and 9.15 lower pulleys, 90lb DW injectors, Boost A Pump.

Logs and tune attached.

Apologies for a long post but this has been bugging me for days now...

Thanks
Jerzy20-07-07 19-44-09.hplPL12CBF JLT intake - base tune DW 90lbinjectors 9.15 lower and 2.6 upper pulley-RC1.hpt