FUEL FUEL FUEL :-) and introductions!

   #1  

Jthessin

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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  

Jthessin

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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
[url]www.Ross-Tech.com[/url]


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
 
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   #3  

Uwe

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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-
 
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Jthessin

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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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   #5  

Jthessin

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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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