Hi....I'd like to know what options there are apart from OEM myself. I hadn't even considered sources othern than OEM myself. I've a MAF that has done >275,000Km and isn't really showing any ill effects but I suspect I'm losing a little at the top end, I haven't done any in depth analysis - I'm considering replacing MAF and O2 sensors on age alone.
re: AFR and MAF bring dirty - if there's dirt on the MAF it has a greater mass which means it reads low - measures lower mass airflow than actual which I would expect to result in lean rather than rich. I'd suspect fatigue rather than being dirty might result in a rich mix.
An OEM or flash tune this would be apparent from the long term fuel trims, which would reveal the ECU is compensating. The XEDE ECU complicates this, and I couldn't say how it handles the scenario - OEM or flash tune will automatically compensate within set tolerances and it isn't really an issue unless it's drifting too far from spec.
Will post any info I find when I get a chance
"Blue Meanie" 2007 Aurora Blue MPS 3 - 18x8.5+44 SSR GTX01 - 235/40R18 Michelin PS5 - 3.5" ETS TMIC - CPE stg 2 mount - HKS/CPE BPV - 2XS inlet - 2XS short shift - Corksport turbo manifold - HT 98 octane tune - Leather/Aluminium handbrake - Momo shifty knob - 7" touchscreen - JDM Mazda Retractable dashtop screen assembly - Bespoke Raspberry Pi Android based GPS/Carplay and instrumentation - 36AH reserve battery and C-TEK isolator - TEIN Street Advanced coilovers 1" drop - Superpro bushings - 220Kw/410Nm.
"Lipstick" 2013 Velocity Red MPS 3 - 18x7.5+48 Enkei RPF1 -225/40R18 Federal RS-RR - CPE TMIC - COBB inlet - CPE stg 2 mount - COBB Stage 1 98 octane tune - COBB shifty knob - 2XS short shift - 2XS turbo manifold.