JETaah
Vendor , w/Business number
A Golf CJAA that I am working on has a code for low fuel pressure at the rail:
Address 01: Engine Labels: 03L-906-022-CBE.clb
Control Module Part Number: 03L 997 030 E HW: 03L 907 309 AA
Component and/or Version: R4 2.0l TDI G000AG 9983
Software Coding: 0050078
Work Shop Code: WSC 02455 002 1048576
VCID: 3064C49DA3D3A7C497-8064
1 Fault Found:
000135 - Fuel Rail/System Pressure
P0087 - 006 - Too Low - Intermittent
Freeze Frame:
Fault Status: 00100110
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 258987 km
Time Indication: 0
Date: 2015.14.15
Time: 21:21:40
Freeze Frame:
RPM: 552 /min
Inj. Quantity: 27.5 mg/str
(no units): 15.0
Pressure: 456.0 bar
Pressure: 88.0 bar
Temperature: 70.2°C
Tank Cont.: 10.1 l
In the Self Study pdf document for the CR 2.0 it says that the aux fuel pump supplies the HPFP fuel at 73PSI when things are working correctly. That is not what I found when I tee'd into the line from V393 to the HPFP. I measured a pretty steady 55PSI.
Well that did not look right so I thought that the aux pump is starving the system and the result was low pressure at the rail. So, I ordered a new aux pump and found that the tee'd gauge still read 55PSI.
Am I reading this pressure in the correct place?
From the document:
Auxiliary Fuel Pump V393
The Auxiliary Fuel Pump V393 is a roller-cell pump.
It is located in the engine compartment and has
the task of feeding fuel from the fuel tank to the
high-pressure pump. The Auxiliary Fuel Pump V393
is actuated by the Engine Control Module (ECM)
J623 through a relay and increases the fuel pressure
presupplied by the Transfer Fuel Pump (FP) G6 in the
fuel tank to approximately 73 psi (5 bar).
Effects of Failure
If the Auxiliary Fuel Pump V393 fails, the engine runs
at first with reduced power. An engine startup is not
possible.
Address 01: Engine Labels: 03L-906-022-CBE.clb
Control Module Part Number: 03L 997 030 E HW: 03L 907 309 AA
Component and/or Version: R4 2.0l TDI G000AG 9983
Software Coding: 0050078
Work Shop Code: WSC 02455 002 1048576
VCID: 3064C49DA3D3A7C497-8064
1 Fault Found:
000135 - Fuel Rail/System Pressure
P0087 - 006 - Too Low - Intermittent
Freeze Frame:
Fault Status: 00100110
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 258987 km
Time Indication: 0
Date: 2015.14.15
Time: 21:21:40
Freeze Frame:
RPM: 552 /min
Inj. Quantity: 27.5 mg/str
(no units): 15.0
Pressure: 456.0 bar
Pressure: 88.0 bar
Temperature: 70.2°C
Tank Cont.: 10.1 l
In the Self Study pdf document for the CR 2.0 it says that the aux fuel pump supplies the HPFP fuel at 73PSI when things are working correctly. That is not what I found when I tee'd into the line from V393 to the HPFP. I measured a pretty steady 55PSI.
Well that did not look right so I thought that the aux pump is starving the system and the result was low pressure at the rail. So, I ordered a new aux pump and found that the tee'd gauge still read 55PSI.
Am I reading this pressure in the correct place?
From the document:
Auxiliary Fuel Pump V393
The Auxiliary Fuel Pump V393 is a roller-cell pump.
It is located in the engine compartment and has
the task of feeding fuel from the fuel tank to the
high-pressure pump. The Auxiliary Fuel Pump V393
is actuated by the Engine Control Module (ECM)
J623 through a relay and increases the fuel pressure
presupplied by the Transfer Fuel Pump (FP) G6 in the
fuel tank to approximately 73 psi (5 bar).
Effects of Failure
If the Auxiliary Fuel Pump V393 fails, the engine runs
at first with reduced power. An engine startup is not
possible.