[mattavino]

Hello everyone,
My first post here will be a negative one, hah.
My '15 550i, with DudMd tune, downpipes, NGK plugs gapped to 0.022; started giving me some hesitation at higher rpms when going WOT, it got worse (with no CEL or DT malfunction), so I pulled the codes and came back with super-knocking on cylinders 1, 2, 3, 4, 5!
Ignition coils are new, plugs are new, mafs are new, fuel rail pressure seems to reaching 2900psi without issue.
Idle surges SLIGHTLY, barely noticeable, which seemed to be fixed with mafs, then came back.
My theory is that injectors are leaking down a bit. I don't believe it's an octane issue, seeing as it got worse over time. I'm running 93.
I need to check AFRs again to see if my theory holds true.
Codes;
102A22 Air mass flow sensor, operating range: Air volume too high
152D08 Super-knocking: Injection switch-off
14401C Super-knocking, cylinder 3: Fuel injection deactivation
14401A Super-knocking, cylinder 4: Fuel injection deactivation
152208 Super-knocking, cylinder 2: Fuel injection deactivation
152108 Super-knocking, cylinder 1: Fuel injection deactivation
144021 Super-knocking, cylinder 3: Continuous injection deactivation
152508 Super-knocking, cylinder 5: Injection switch-off
201201 DME, slave, protection against tampering: data manipulation detected (obviously lol)

Any insight?

[550l]

How many miles are on it?

[mattavino]

Originally Posted by 550l

How many miles are on it?

89,000

[mattavino]

Injectors, as suspected, fixed the issue.