Bad HPFP ? (RESOLVED)

[tigerwoods1]

Car sat with this problem since 2021. Feels like it has 10% power.
Ran on VCDS:

001092 - EVAP Purge Control Valve (N80)
P0444 - 004 - Circuit open

00579 - Solenoid Valve for Boost Pressure Control (N75)
P0242 - 004 - Malfunction

008851 - Fuel Pressure Regulator Valve (N276)
P2293 - 002 - Inadequate Performance - Intermittent

000054 - O2 sensor malfunction/Open Circuit
P0036

000051 - Turbo Bypass Valve Control Circuit
P0033 - 004 Malfunction/Open Circuit


The fuel rail had pressure that was staying just under 50 bar. Has an ECU tune.
Thought it was a vacuum leak at first but could it be a HPFP? Any help diagnosing
would be awesome the motor is great.

 

[BurgerGuy]

• What year GTI is this?
• Is the 50 bar reading taken at idle or while driving?
• P0444 - http://wiki.ross-tech.com/wiki/index.php/16828/P0444/001092

The other faults you listed seem to imply there might be a wiring issue somewhere.

 

[tigerwoods1]

• What year GTI is this?
• Is the 50 bar reading taken at idle or while driving?
• P0444 - http://wiki.ross-tech.com/wiki/index.php/16828/P0444/001092

The other faults you listed seem to imply there might be a wiring issue somewhere.

It is an 06 A3; identical to a mk5 GTI and the pressure reading was at idle. Swapped in a new N75 solenoid and waiting to plug in to VCDS.
Tomorrow will start it and see if it the power feels normal. As of last try, car barely wanted to move while slipping the clutch in 1st.

My A3 timing snapped back in 2017 with 170,xxx on the odo and paid to rebuild it + new longblock. Was not ready to get rid of it, but with
220,000 on the body a lot more problems pop up.

 

[tigerwoods1]

10A fuse F32 in the engine compartment fuse box was blown. The motor is working 100% now, cannot believe three years later it was a fuse.