Q5 no start - no pressue from the HPFP after checking fuel metering valve

arjax

Veteran Member
Joined
Sep 23, 2011
Location
Florida
TDI
2001 allroad TDI BHW swap 6spd code GLX, 2014 Q5 3.0L TDI
In trying to solve my p0087 issue, I decided to pull the fuel metering valve to check for metal shavings. Thankfully there wasn't but now the car won't start. I didn't tinker with HPFP only the fuel lines that connect to the fuel rails to move them around while getting the intake manifold off and on. I did run the lift pump a fuel times but I didn't open the low pressure lines.

I have this also cross posted on Ross Tech's forum. Here's a link to the post. VCDS shows no pressure being made and the engine is spinning at 230 rpm.

I do have a fuel rail cap (only one). So I tried capping off each injector one at a time to see if one of them was leaking. No change. There is some fuel that comes out when I removed the cap so some fuel is being transferred.

The only other thing that I have done to the car was I had the ECU send off for a bench test. A problem was found related to the EGR temp sensor.

Thanks in advance for any help. Here's the code from VCDS. The graph below is from two times I tried to start the car.

Code:
21233 - High Pressure Fuel Rail
          P00C6 00 [01100101] - Minimum Pressure Not Reached
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 259696 km
                    Date: 2024.01.29
                    Time: 09:56:35

                    Engine RPM: 228.00 /min
                    Normed load value: 100.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 12 °C
                    Intake air temperature: 13 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 10.600 V
                    Unlearning counter according OBD: 40
                    Fuel temperature: 14.3 °C
                    Mean injection quantity: 31.11 mg/stroke
                    Rail pressure regulation: status-Bits 0-7: 0
                    Fuel high-pressure: actual value: 2500 hPa
                    High fuel pressure: specified value: 300000 hPa
                    Pressure control valve adaptation factor: 1.1058
                    Fuel level: 43.00 l
 
Last edited:

arjax

Veteran Member
Joined
Sep 23, 2011
Location
Florida
TDI
2001 allroad TDI BHW swap 6spd code GLX, 2014 Q5 3.0L TDI
Update: I sent the injectors and pump out for testing. Injectors showed signs of wear which is what you expect for 160k on them. The pump was dead and wasn't making fuel pressure on the test bench.
 

Jbwoo

Well-known member
Joined
Oct 28, 2018
Location
Kingston WA
TDI
15 GSW 06 Jetta BRM
Thanks for updating. Who did you send them to for testing? and have you considered the whitbread cp4 disaster kit when it all goes back together?
 

arjax

Veteran Member
Joined
Sep 23, 2011
Location
Florida
TDI
2001 allroad TDI BHW swap 6spd code GLX, 2014 Q5 3.0L TDI
Welcome. I sent it off to Williams Diesel in Ocala, FL. I am west Jacksonville. Thanks for mentioning the kit...I will definitely have to consider it.
 
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