Maibi tarak, unker baru confirm is narrowband O2 sensor, so even the ecu tatau KEK. That means its running pretty much on buku sifir as long as its not in closed loop. Actually explains a lot cause unker always wonder there's a certain threshold when the engine starts to behave differently when accelerating esp on a slow/smooth pedal push alongside a higher efficiency acceleration vs tetiba start makan more minyak on pijak.
Hmm... so in this case at redline 12.5 should be normal as expected and going slightly higher is prob not detrimental? My concern is the increase to 15-16 at 5000rpm which doesn't make much logic. However, another birdie kinda confirmed this saying the stock maibi of these era had too lean low rpm and too rich high rpm mebbe for reliability concerns. It does match the pattern/maps of other maibi retunes, the big question is how much is too much? Unker plan to visit anoither shop mmg to have them verify if the timings were precisely tuned or just spammed across the cells. Unker saw the AFR adjustment had quite a lot of runs, but after that then they should run to timing, but hardly spent much time there.

Yee narrowband as suspected, no point to run wideband on tin milo la.. It is a jimat minyak car for sure since the lightweight wheels went in - but it seems to have distorted the output on the wheels la, so unker think switching to stock might show a very different curve. The low TQ is way too high for the NA setup.

Like dafuq? suka2 drop packet meh? Ingatkan the piggyback intercepts the wires going between ignition, fuel must go through it right? So if the processor sudah overload then it just kasi bypass? I did check the wiring la, without the bypass plug to connect the wires, ignition tak sampai engine, and prob fuel feed too and ecu went rage.

So what happens then? Engine get one set instruction from boss wife normally then tiba2 boss masuk and the work fakkap? Welp, kena tunggu masa pigi tarik round 2 bah - so far engine sound overall did not increase apart from that sparkly signature la. Going to compare against stock ecu map using the bypass later this week.
Hmm prob depends on how the thing is wired up? The more unker find out about my engine, the more simplistic its mechanism seems to be, prob cause is tin milo - atm i am logging reads on the timing advance (heck i actually cant tell if its VVT timing adv or ignition kek, cause no other timing reads coming out of obd) seems to be responding as per usual, fuel/AFR wise it does seem to still correspond to the map captured on the dyno.

I am spending more fuel accelerating now at low revs (but nett rev time prob less with same coasting), the mid revs actually compensates since it supposedly produces more hamsters for similar AFR. Closed loop is still active based on the readings too, so I'm not sure how piggyback manipulates that mode, or it just gives the same amount of fuel/advance based on the command issued vs throttle? Unker am curious too the ECU so easy to cheat it dunno its being taken for a ride meh? won't the engine sensors/fuel tell a diff story then cause him to rage? Or maybe my "improved" consumption is actually due to the ECU dunno the fuel rail actually give more fuel than told? Machiam what they say those haram jadah OBD chips do lel.