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Thread: FUEL FUEL FUEL :-) and introductions!

  1. #1
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    FUEL FUEL FUEL :-) and introductions!

    hello all!
    Jim hailing from the Charlotte NC Area. been in Audi's for several years with 0 issues.
    Recently purchased a used '13 Q5 PP to haul my dogs around in. Ran fine first few months. then developed a pretty severe stutter/hesitation at 1900-2200 RPM with a load on the engine. if no load there's was very little of it. no codes first few months. finally threw a misfire on one cylinder. I changed all plugs and coil packs and it reduced hesitation/stutter by like 80%. changed out the fuel pump/filter assembly about a month ago with an Audi unit from ECSTuning and it reduced it a further 10-15%. 2 days ago, driving to town and after 5 minutes of driving she stuttered REAL BAD and shut off. current bad codes from VCDS are as follows:

    P2294 Fuel Pressure Regulator Valve (N276) Open Circuit
    P261A Coolant Pump 2 Open Circuit (coolant temp at time of failure was only 98C)
    P310B Low Pressure Fuel Regulation - Fuel Pressure Outside Spec - MIL on - Confirmed- Tested since memory clear
    P2539 Fuel Pressure Sensor (G410) Open Circuit Intermittent - Not Confirmed - Tested Since Memory Clear
    P0087 FuelRail/System Pressure - Too Low Intermittent - Not Confirmed - Tested Since Memory Clear

    Right now its hit or miss, sometimes she will start right up and run for 3-8 minutes, sometimes she just urns over and never fires...
    Im thinking its going to be a loose wire somewhere...Also, I'm still able to get like 500+ miles per tank so I never saw any reduction in fuel economy
    Thanks ahead of time for any expert opinions I may find here!!

  2. #2
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    Code:
    Wednesday,11,September,2019,18:01:02:51651
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.1.0 (x64)  HEX-NET CB: 0.4508.4
    Data version: 20190529 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WA1LFAFPXDA072839   License Plate: 
    Mileage: 123000km-76428mi   Repair Order: 
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: FP-AU48 (8R0)
    Scan: 01 02 03 05 08 09 15 16 17 19 36 42 44 46 47 52 53 56 5F 62
              6C 6D 72
    
    VIN: WA1LFAFPXDA072839   Mileage: 123000km-76428miles
    
    01-Engine -- Status: Malfunction 0010
    02-Auto Trans -- Status: OK 0000
    03-ABS Brakes -- Status: OK 0000
    04-Steering Angle -- Status: OK 0000
    05-Acc/Start Auth. -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    16-Steering wheel -- Status: OK 0000
    17-Instruments -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    36-Seat Mem. Drvr -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    47-Sound System -- Status: Malfunction 0010
    52-Door Elect, Pass. -- Status: OK 0000
    53-Parking Brake -- Status: OK 0000
    56-Radio -- Status: OK 0000
    5F-Information Electr. -- Status: Malfunction 0010
    62-Door, Rear Left -- Status: OK 0000
    6C-Back-up Cam. -- Status: OK 0000
    6D-Trunk Elect. -- Status: OK 0000
    72-Door, Rear Right -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (DET-CPMA)       Labels:. 06H-907-115-CDN.clb
       Part No SW: 8R1 907 115 B    HW: 8K2 907 115 L
       Component: 2.0l R4/4V TF H09 0005  
       Revision: ECH09---    
       Coding: 6A2A0013242600062000
       Shop #: WSC 40763 001 1048576
       ASAM Dataset: EV_ECM20TFS0118R1907115B 001006
       ROD: EV_ECM20TFS0118R1907115B.rod
       VCID: 342405EE9FF2ACEF4D-8060
    
    5 Faults Found:
    4608 - Fuel Pressure Regulator Valve (N276) 
              P2294 00 [032] - Open Circuit
              Intermittent - Not Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 2
                        Mileage: 123007 km
                        Date: 2019.09.07
                        Time: 10:29:52
    
                        Engine speed: 0.00 /min
                        Normed load value: 0.0 %
                        Vehicle speed: 0 km/h
                        Coolant temperature: 54 ∞C
                        Intake air temperature: 30 ∞C
                        Ambient air pressure: 990 mbar
                        Voltage terminal 30: 12.345 V
                        Unlearning counter according OBD: 40
                        Median injection timing: 0.000 ms
                        Engine operating condition: Idling
                        Engine operating condition-Test_Program_Channel 87: 5
    
    18062 - Coolant Pump 2 
              P261A 00 [047] - Open circuit
              Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Mileage: 121856 km
                        Date: 2019.07.25
                        Time: 16:39:10
    
                        Engine speed: 0.00 /min
                        Normed load value: 0.0 %
                        Vehicle speed: 0 km/h
                        Coolant temperature: 99 ∞C
                        Intake air temperature: 47 ∞C
                        Ambient air pressure: 990 mbar
                        Voltage terminal 30: 12.557 V
                        Unlearning counter according OBD: 40
                        Median injection timing: 0.000 ms
                        Engine operating condition: Idling
                        Engine operating condition-Test_Program_Channel 87: 5
    
    2636 - Low Pressure Fuel regulation 
              P310B 00 [237] - Fuel Pressure Outside Specification
              MIL ON - Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Mileage: 123007 km
                        Date: 2019.09.07
                        Time: 10:22:20
    
                        Engine speed: 1251.00 /min
                        Normed load value: 7.5 %
                        Vehicle speed: 27 km/h
                        Coolant temperature: 98 ∞C
                        Intake air temperature: 47 ∞C
                        Ambient air pressure: 980 mbar
                        Voltage terminal 30: 14.112 V
                        Unlearning counter according OBD: 40
                        Median injection timing: 0.710 ms
                        Engine operating condition: Idling
                        Engine operating condition-Test_Program_Channel 87: 5
                        Driver-side belt buckle status-Bits 0-7: 31
                        Engine torque: 19.2 Nm
    
    5650 - Low Pressure Fuel Sensor (G410) 
              P2539 00 [096] - Open Circuit
              Intermittent - Not Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 2
                        Mileage: 123007 km
                        Date: 2019.09.07
                        Time: 10:30:15
    
                        Engine speed: 0.00 /min
                        Normed load value: 0.0 %
                        Vehicle speed: 0 km/h
                        Coolant temperature: 54 ∞C
                        Intake air temperature: 30 ∞C
                        Ambient air pressure: 990 mbar
                        Voltage terminal 30: 12.392 V
                        Unlearning counter according OBD: 40
                        Median injection timing: 0.000 ms
                        Engine operating condition: Idling
                        Engine operating condition-Test_Program_Channel 87: 5
    
    2838 - Fuel Rail/System Pressure 
              P0087 00 [096] - Too Low
              Intermittent - Not Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Mileage: 123007 km
                        Date: 2019.09.07
                        Time: 10:22:31
    
                        Engine speed: 833.50 /min
                        Normed load value: 48.2 %
                        Vehicle speed: 14 km/h
                        Coolant temperature: 99 ∞C
                        Intake air temperature: 44 ∞C
                        Ambient air pressure: 980 mbar
                        Voltage terminal 30: 14.182 V
                        Unlearning counter according OBD: 40
                        Median injection timing: 13.015 ms
                        Engine operating condition: Part. load
                        Engine operating condition-Test_Program_Channel 87: 6
    
    Readiness: 0000 0000
    Last edited by Uwe; 09-11-2019 at 07:40 PM. Reason: CODE tags

  3. #3
    Benevolent Dictator Uwe's Avatar
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    Check the wiring diagram for that engine to see what the things that show "Open Circuit" might have in common. A fuse? A connector? A ground point?

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  4. #4
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    Well, as embarrassing as this is to admit, turns out the fuel tank was empty. I seem to have a problem with the fuel level sending unit as it showed the tank as half full when in fact the tank was bone dry. I pulled the fuel filter pump assembly out of the tank so that I could doublecheck that everything was connected properly and saw that the tank was bone dry. after filling up, the car now starts again and runs still has a very very slight hesitation which will require more digging. And I will need to also troubleshoot why the Audi brand fuel pump/filter unit/fuel level is not working properly

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  6. #5
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    Well, as embarrassing as this is to admit, turns out the fuel tank was empty. I seem to have a problem with the fuel level sending unit as it showed the tank as half full when in fact the tank was bone dry. I pulled the fuel filter pump assembly out of the tank so that I could doublecheck that everything was connected properly and saw that the tank was bone dry. after filling up, the car now starts again and runs still has a very very slight hesitation which will require more digging. And I will need to also troubleshoot why the Audi brand fuel pump/filter unit/fuel level is not working properly

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