ECU Adaptation: Fuel Injection Timing Explained

Hi,

I once adjusted the setting of my fuel injection pump after...
Diagram in the technical article 'Tuning the VW 1.9L TDI'.
'The distributor injection pump was checked and it was determined that...'
The value deviates slightly.
Idle.
At a fuel temperature of 150, the value is approximately...
At 50 and measurement block 4, the value is 2.8.
At 3000 revolutions per minute in 3rd gear.
Measurement block 4, value 4 is approximately 45 at idle, and increases to about 90 under full throttle.
Okay, here are my questions:
Is this typical for the ASV?
Does changing channel 4 in the control unit adaptation cause...?
Is this similar to a problem caused by a misaligned fuel injection pump?

Achim wrote:

Does changing channel 4 in the control unit adaptation cause...? same as a fuel injection pump misalignment?

Hi Achim,

No.
Twisting the pump changes the mechanical baseline setting and shifts the mechanical range within which the electronic control system operates.

If you only adjust the electronic setpoint values via adaptation, the control system can quickly reach a limit in reality due to the possible actual values, so that the intended success of the adaptation may only be partially achieved.

Therefore, after each adjustment, it should be checked using a test run to see if the injection timing control ratio is frequently hitting its limit. If this is the case, the basic setting of the fuel pump should also be corrected.