ISTA+ DME Blue Block - MEV1746 MV1746 Bmw E Series LCI

2B79 была ошибка всегда еще до запуска мотора, еще когда я восстанавливал dme

That's an important detail — it changes the priority.

What it means
A fault that was already there before the engine ever ran, during the DME restore work, is most likely a legacy entry from that period. With ignition on and the unit in the broken/mixed state, the DME runs its output-stage checks anyway, so an activation fault on the inlet VANOS output would set without a single revolution. That is not evidence of a real electrical defect now that the block is restored, programmed and coded.

How to prove it
The only thing that matters is whether 2B79 is current or just stored after a clean cycle on the restored DME:

• Plug the MAF back in (this also removes 2EF2).
• Clear the full fault memory.
• Ignition off, wait for bus sleep (~1 min), then start, idle to warm, short rev to ~3000 rpm, a few load changes so VANOS actually gets commanded.
• Re-read and look at the fault details, not just the code: the "fault present / fault not present" flag and the frequency counter. If the counter stays at the old value and the flag says not present, the entry is history — ignore it.

If it comes back as current after that, then do the checks from my last post: coil resistance on both VANOS solenoids compared against each other, continuity to the DME pins, then ISTA component activation on the inlet valve.

Separate issue — the noise
Still unresolved, and that one I would not drop. Same at cold and hot, unaffected by new idlers and belt, PS pump quiet but steering feels weak on pressure — that combination still points at the brake vacuum pump (rear of the head, driven off the exhaust cam) or, given the weak steering assist, the PS pump itself even if it isn't the noise source. A stethoscope on the rear of the head versus the PS pump will separate them in minutes.

If you can, post a short video with the sound and the fault detail screen for 2B79 (with counter and present/not-present), plus your current I-level after the update. That's enough to close both items.