Intermittent power issue, Alfa 156 2.4 JTD common rail, 100,000 km

Hello everyone,

I have the above. Problem starts around 2000 RPM and continues until the engine shuts down.
No error code stored, according to the garage.

'The following defect loop has been identified:'

1. LMM (already cleaned, but no improvement!)
2. Fuel pressure sensor, rail pressure (electric). (Connections checked)
3. Pressure vessel (operates under pressure) for a VTG loader, Garrett brand (tested with an air pump, and appears to be in good condition).

Here are the following steps I still want to complete:

- Replace pressure vessel? (Is the membrane soft?)
- Check the fuel pressure sensor (suggestion?).
-'Trying a 'diode trick' on the LMM?'

Has anyone else experienced a similar problem, or does anyone have any tips?

You're welcome for the information.
Regards,
Andy

After modifying the connector to the Bosch mass airflow sensor (MAF) with a diode, the problem was largely resolved.
After that, I installed a new Bosch mass airflow sensor, and now it's perfect. Unfortunately, it was a bit expensive! A Pierburg alternative would be welcome if we knew which one would be compatible.
Regards,
Andy

Deleted as requested.

Hello Gustav,

Thank you for the information. It would have been possible.
Regards,
Andy