93 Octane

Cars AF learn sticks at 7.81 and adjusts slowly on a wot pull. Noticed it would backfire alot more city driving and wondering if boost leak vs. O2 sensor problem? EGR command issue too feeling lean condition roughly when it opens.. or it couldnt be an egr issue and something else entirely.

stage 1

2019 Golf R DSG USDM APR 93 octane high torque ECU APR TCU file APR spark plugs Racingline R600 intake and tube APR TIP Racingline turbo muffler delete Stock downpipe APR valved exhaust

2019 Golf R DSG USDM APR 93 octane high torque ECU APR TCU file APR spark plugs Racingline R600 intake and tube APR TIP Racingline turbo muffler delete Stock downpipe APR valved exhaust

Boost leak fix