arjax
Veteran Member
Hello...I am trying to determine if I have lift pump or HPFP issue.
Background
A year ago I got a blinking glow plug light with codes P0087 and P053F. I changed the fuel filter and the no issues.
About ten days ago, the problem returned with the same codes. It has been 20k miles since I changed the fuel filter so I changed the filter and the issue went away.
Three days ago, the problem returned.
Diagnosis Performed So Far
Fuel pressure test (Engine off)
I placed a fuel pressure gauge where the hard line is near the airbox and used VCDS to active the pump. The fuel pressure read 70psi. I noticed that while the gauge was on that the pump would hesitate every so often with the pressure dropping to about 50psi and then right back to 70psi.
Today I did four runs with the pump using a stop watch to record when the pump would cut out. My thought was to see if the cuts happened at the same time or if there was some variability to it.
Run 1
:27, :40, :53, 1:06 (turned off pump after the third time)
Run 2
:33, :46 (turned off pump after it ran for 1 minute)
Run 3
:19, :25, :57 (turned pump off after the third time)
Run 4
1:08, 1:15, 1:22 (turned pump off after the third time)
Fuel Pressure test (Engine on)
When I started the engine this morning, the pressure went to to 65psi and then drops to 55 psi. About 7 seconds into starting the car hesitates and seems like it going to die but recovers and then the glow plug light in the cluster begins blinking. (click here for the video)
Final Thoughts
I am little in the fog as to whether it's the transfer pump or the HPFP after gathering some data. I am hoping someone can shed some light on the issue.
Thanks in advance.
Background
A year ago I got a blinking glow plug light with codes P0087 and P053F. I changed the fuel filter and the no issues.
About ten days ago, the problem returned with the same codes. It has been 20k miles since I changed the fuel filter so I changed the filter and the issue went away.
Three days ago, the problem returned.
Code:
5215 - Fuel Rail/System Pressure
P0087 00 [036] - Too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 223776 km
Date: 2022.06.16
Time: 10:54:34
Engine RPM: 686.50 /min
Normed load value: 49.8 %
Vehicle speed: 0 km/h
Coolant temperature: 61 °C
Intake air temperature: 37 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.020 V
Unlearning counter according OBD: 78
Fuel temperature: 34.4 °C
Mean injection quantity: 11.05 mg/stroke
Rail pressure regulation: status-Bits 0-7: 5
Fuel high-pressure: actual value: 112600 hPa
High fuel pressure: specified value: 250000 hPa
Pressure control valve adaptation factor: 1.1263
Fuel level: 28.00 l
21375 - Fuel Pressure too Low during Cold Start
P053F 00 [101] - -
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 223776 km
Date: 2022.06.16
Time: 10:54:34
Engine RPM: 686.50 /min
Normed load value: 49.8 %
Vehicle speed: 0 km/h
Coolant temperature: 61 °C
Intake air temperature: 37 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.020 V
Unlearning counter according OBD: 78
Fuel temperature: 34.4 °C
Mean injection quantity: 11.05 mg/stroke
Rail pressure regulation: status-Bits 0-7: 5
Fuel high-pressure: actual value: 112600 hPa
High fuel pressure: specified value: 250000 hPa
Pressure control valve adaptation factor: 1.1263
Fuel level: 28.00 l
Fuel pressure test (Engine off)
I placed a fuel pressure gauge where the hard line is near the airbox and used VCDS to active the pump. The fuel pressure read 70psi. I noticed that while the gauge was on that the pump would hesitate every so often with the pressure dropping to about 50psi and then right back to 70psi.
Today I did four runs with the pump using a stop watch to record when the pump would cut out. My thought was to see if the cuts happened at the same time or if there was some variability to it.
Run 1
:27, :40, :53, 1:06 (turned off pump after the third time)
Run 2
:33, :46 (turned off pump after it ran for 1 minute)
Run 3
:19, :25, :57 (turned pump off after the third time)
Run 4
1:08, 1:15, 1:22 (turned pump off after the third time)
Fuel Pressure test (Engine on)
When I started the engine this morning, the pressure went to to 65psi and then drops to 55 psi. About 7 seconds into starting the car hesitates and seems like it going to die but recovers and then the glow plug light in the cluster begins blinking. (click here for the video)
Final Thoughts
I am little in the fog as to whether it's the transfer pump or the HPFP after gathering some data. I am hoping someone can shed some light on the issue.
Thanks in advance.