Problem With TFSI Power Loss

[Anonymous A4]

Hi there folks. I noticed that my 2.0 TFSI A4 has devoloped a 'stutter' or loss of power whn I am putting it under load in third, fourth, fifth or sixth gear, more noticable in third and forth when pulling out of a slip way onto a motor way etc.
I carried out a code read this evening and found the below fault :

Readiness: 0000 0100
Saturday,05,May,2012,19:38:10:19796
VCDS Version: Release 11.11.1 (x64)
Data version: 20111209

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 01: Engine Labels: 06F-907-115-AXX.lbl
Control Module Part Number: 8E0 910 115 Q HW: 8E0 907 115 D
Component and/or Version: 2.0l R4/4V TFSI 0030
Software Coding: 01040003180F0120
Work Shop Code: WSC 66565 257 00032
VCID: 2F6618D4BE066C1

004506 - Fuel Pressure Sensor (G247)
P119A - 001 - Malfunction
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 6
Mileage: 192316 km
Time Indication: 0

Freeze Frame:
RPM: 763 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 69.0°C
Temperature: 25.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.224 V

I have only spent a little time this evening on it and have erased the faults to see what reappears after driving it tomorrow again but I have never came across this fault before and have done a little Saturday night 'Googling' while me and the wife watched a crap movie and have found mixed opions from folk saying that its either a sensor on the fuel rail or the hpfp itself. My understanding from what I seen with the little time that I had spent on it tonight is that the fuel pump sensor that sits on top of the hpfp is working as I used VCDS to activate it and it clicked on and off and did not bring up any faults after activation.
Has anyone had any experiance with this fault ?
Thanks


I have a complete follow up of the story so far in the link that I will get for yous now. I really am stumped with this ????

[Anonymous A4]

This is the story up to now http://www.vwaudiforum.co.uk/forum/s...d.php?t=132506

[BoSNiaN]

Fuel Pressure Sensor malfunction possibly. Take it to the dealership and get it diagnosed. If its faulty, they'll replace it for free because it is under extended warranty.

[A-BlacK_MambA-4]

Fuel Pressure Sensor malfunction possibly. Take it to the dealership and get it diagnosed. If its faulty, they'll replace it for free because it is under extended warranty.

^^This. Dealer replaced mine for free under recall/extended warranty about a month ago and my car has never ran or idled better. Part No: 06E-906-051 K
$46 from Europa Parts
http://www.europaparts.com/thrust-se...6e906051k.html

[Anonymous A4]

I know it means nothing in this game these days but I replaced the spark plugs and the fuel filter with genuine Audi parts last year and have only done 3'000 miles ( she is only for the weekends lol ) and I have also had the coil packs replaced under the recall at the time so hopefully they are ruled out.
I had previously erased the fault yesterday and had an 80 mile round trip to make today so before I set off, I rechecked for faults... NO FAULTS FOUND ( as expected ) and I checked the MVB 103 and 106 with the engine at idle and this is where I think I might have found some strange readings. I have attached a picture from my phone to show yous. In MVB 103, the Fuel Pressure Regulator measurement shows -71 in the first picture where as when you hover over it, the reading is suposidly to be between 1300 - 3000 mbar at idle ( or something like that )
I went about my trip and the car done the stutter that I was talking about and when I returened, I carried out a fault code check and found this now :

2 Faults Found:

004506 - Fuel Pressure Sensor (G247)
P119A - 001 - Malfunction
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 3
Mileage: 192505 km
Time Indication: 0

Freeze Frame:
RPM: 845 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 74.0°C
Temperature: 16.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V

008583 - Bank 1; System too Lean at Idle
P2187 - 004 -
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 2
Mileage: 192505 km
Time Indication: 0

Freeze Frame:
RPM: 838 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 72.0°C
Temperature: 21.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.224 V


Readiness: 0000 0000

SOOOOO, I have the same fault in and also another fault has appeared lol.

[Anonymous A4]

ANOTHER UPDATE !
Replaced the G247 sensor and erased all faults BUT.....
Faults are back into the ecu, exact same two as before, g247 malfunction and too lean at idle. Checked her all over for vacuum leaks and could visually see none. Replaced the hose which I thought was possibly giving trouble too.

STILL THE SAME PROBLEM :aargh4::aargh4::aargh4::aargh4::aargh4::aargh4::a argh4::aargh4::aargh4:

After wanting to throw a match into the said petrol tank, I calmed myself down and worked out how to log a few data blocks with Vag Com. To me, the data that is here, looks ok but I am starting to get blinded by the bugger now :(


[/QUOTE]

[Anonymous A4]

OK, I have logged and turned some info into a graph.

BLUE = LOW FUEL PRESSURE ( lowest is 4.21bar to highest being 6.17bar )
RED = HIGH FUEL PRESSURE ( specified )
GREEN = HIGH FUEL PRESSURE ( actual )



I just want to get my head around this and throw what I am thinking out there and see if anyone agrees with me. YES, I definitely have a fuel pressure that the ecu is picking up as it is logging a fault. When I took these readings, the problem that I am having, was very apparent and stuttering etc. The results here show both the low and high pressure are pretty consistent with each other and do not drop out of specification..... SOOOO.... Is it maybe possible that the problem that I am having is not related to the fuel pressure problem that is being stored in the ecu ??

[A-BlacK_MambA-4]

OK, I have logged and turned some info into a graph.

BLUE = LOW FUEL PRESSURE ( lowest is 4.21bar to highest being 6.17bar )
RED = HIGH FUEL PRESSURE ( specified )
GREEN = HIGH FUEL PRESSURE ( actual )



I just want to get my head around this and throw what I am thinking out there and see if anyone agrees with me. YES, I definitely have a fuel pressure that the ecu is picking up as it is logging a fault. When I took these readings, the problem that I am having, was very apparent and stuttering etc. The results here show both the low and high pressure are pretty consistent with each other and do not drop out of specification..... SOOOO.... Is it maybe possible that the problem that I am having is not related to the fuel pressure problem that is being stored in the ecu ??

I threw a code, do you have one now or did you have one at the beginning? If no code, I'd say those codes are stored in the ECU. Maybe someone with more VAG-COM experience can chime in on that as I'm a novice in that area. So the sensor you replaced is identical to the one in the link I posted?

[Anonymous A4]

Yes, exact same part number

[Charles.waite]

Have you checked your cam follower? Stuttering could very easily be caused by the follower being worn through and the cam and hpfp eating damaged from the metal-metal contact. The pressure drop you're seeing can somewhat attest to fueling being the cause of the stutter. If you can put rpms on the x-axis it makes it easier to figure out when the fuelling is dropping.

You might want to pull your cam follower and check it out. If you're tuned you could have issues with the software. Lastly you should look into a higher spec prv 135bar maybe.

[Anonymous A4]

I replaced the cam follower 3'000 miles ago so hopefully
It is ok.
I am about to spend the day de carboning my valves and change my stock plugs to the NGK BK7E with a .032 gap so I will give everything a really good inspection and test again after. I did recently get a remap done and I am not that confident in it so I think the next stage will be to get it to another TRUSTED tuner

[Anonymous A4]

Ok, latest update ;
I carried out a decarb on my valves today. They were very bad but they are now shining like a new pin :D
As I was doing the decarb, I :
Got the valves like new ( as good as can be )
Cleaned the flat metal slides that go into the valve area.
Cleaned, checked and lubed intake flaps.
Checked and replaced all vaccum pipes near the turbo, C
leaned and checked the pcv valve ( which is new 3000 miles ago )
Stripped and cleaned high pressure fuel pump ( no signs of wear )
Cleaned cam follower ( new 3000 miles ago)
Check dv valve ( new revised version was replaced 3000 miles ago )
Cleaned throttle body out
Replaced spark plugs with BKR6E ( as 7E was not available to me today )
Cleaned all fuel lines with an airline and brake cleaner ( including high pressure )
Replaced fuel filter
Cleaned G247 sensor ( new 100 miles ago )
Replaced the fuel regulating valve on the high pressure fuel rail
Replaced Air Filter
Cleaned any electrical connections that I could get to.

I only primmed the fuel and started her after I replaced the fuel filter.
I only replaced the plugs with the new ones after letting her splutter and burn out all the old bits of crap from the clean.

Took her for a drive..... Same friggen faults !!!! Still hesitates and then goes fine and then hesitates and then goes fine under load in 3rd 4th 5th and 6th when under load ( no missfire count ) and still the 2 same faults as mentioned at the start of the thread.... G247 malfuntion, too lean at idle AND now she decides to rev above 1000 intermitantly :(
REALLY ! What else can I do !!! ARGHHHHH !!!

[Anonymous A4]

These are the DEMON faults :


2 Faults Found:

004506 - Fuel Pressure Sensor (G247)
P119A - 001 - Malfunction
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 3
Mileage: 192505 km
Time Indication: 0

Freeze Frame:
RPM: 845 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 74.0°C
Temperature: 16.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V

008583 - Bank 1; System too Lean at Idle
P2187 - 004 -
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 2
Mileage: 192505 km
Time Indication: 0

Freeze Frame:
RPM: 838 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 72.0°C
Temperature: 21.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.224 V


Readiness: 0000 0000

[Anonymous A4]

Anyone any ideas ? Would installing a catch can completly do away with the whole pcv system and make it like a normal engine by keeping the vaccum to the inlet manifold rather than the whole engine ?

[Charles.waite]

Anyone any ideas ? Would installing a catch can completly do away with the whole pcv system and make it like a normal engine by keeping the vaccum to the inlet manifold rather than the whole engine ?

The engine should be under vacuum. Its not "normal" for it to be operating under pressure. Audi engines are designed to operate differently than "normal" engines.

Please read up on the PCV delete threads FULLY as theres a lot of bad info out there. Many guys delete all that stuff in the name of simplicity and end up having issues down the line. In my opinion, for a DD car, you need to retain as much of the factory PCV system as possible.

[Anonymous A4]

Thanks Charles. I do understand the PCV and have replaced it not long ago but it seems to be a real pain in the ass with the amount of problems with vacuum and vacuum leaks. I was thinking about the catch can to see if it helped with this.
I have came to the conclusion that the lean at idle problem is due to ANOTHER vacuum problem as I took the car for a 50 mile trip today and have these problems :
I am going to check the wiring for the other fault relating to the fuel sensor as it is the only thing left ( I think ) apart from the ECU

3 Faults Found:

004506 - Fuel Pressure Sensor (G247)
P119A - 001 - Malfunction
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 192743 km
Time Indication: 0

Freeze Frame:
RPM: 794 /min
Load: 12.5 %
Speed: 0.0 km/h
Temperature: 87.0°C
Temperature: 41.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.097 V

001287 - Idle Control System RPM
P0507 - 001 - Higher than Expected.
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 4
Mileage: 192743 km
Time Indication: 0

Freeze Frame:
RPM: 890 /min
Load: 13.3 %
Speed: 0.0 km/h
Temperature: 69.0°C
Temperature: 15.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V

008825 - Leak in Air Intake System
P2279 - 002 -
Freeze Frame:
Fault Status: 01100010
Fault Priority: 0
Fault Frequency: 1
Mileage: 192745 km
Time Indication: 0

Freeze Frame:
RPM: 875 /min
Load: 12.9 %
Speed: 0.0 km/h
Temperature: 72.0°C
Temperature: 18.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V


Readiness: 0010 0100

[yungcotter]

Okay I had The same problem codes. Idle higher than expected and system too lean. at first the dealer thought it was the pcv but it wasnt that. Than they found out my valve cove gasket was so bad it was creating a vacuum leak, also my diverter valve was bad and was causing rough idle and system too lean.

[Anonymous A4]

As in the rocker cover gasket ? Leaking oil etc ?

[yungcotter]

yupp exactly. it was leaking a small amount of oil but the other dealer said dit was fine the next dealer said it could be the problem and that was one of the main problems i had rough idle especally when starting the engine would almost stall out than it would rev up and idle 1000+ rpm to stop stalling.

[Anonymous A4]

mmm, interesting, I know there was a small oil leak from the gasket last year but it seems to have stopped. It makes sense though, if there is oil leaking out, there would also be air going in. Ill check around it again this week and see what I can find. Thank you very much

[Charles.waite]

mmm, interesting, I know there was a small oil leak from the gasket last year but it seems to have stopped. It makes sense though, if there is oil leaking out, there would also be air going in. Ill check around it again this week and see what I can find. Thank you very much

At the very least, check the torques on the Valve Cover bolts. The stupid rubber washers tend to make them back off after some time. Get a torque wrench and retorque them to 10Nm or 7ft.lbs.

[Anonymous A4]

Its next on my list. There was alot of shit repair work done to the engine before I bought it so it is possible

[Anonymous A4]

Update. A schoolboy error by myself made the idle problem as I had left a breather pipe off :) I refitted it and she idles like a pur from a kitten. Really happy with the idle now. My problem is still there though :(
While I was on the motorway today, if I press the gas while in fourth, fifth or sixth, she hesitates and splutters like mad. I checked the misfire count again ( as the vagcom was in the car still ) and there was none in any of the cylinders.
Arghhhh !!! It has to be either boost or fuel right ?

[Charles.waite]

sounds like fuel.

[Anonymous A4]

Yea, I really am lost with it lol

[Anonymous A4]

Ok, I "think" that I might have found the problem. I disconnected the MAF and it drives perfectly with no hesitations or drop in power. Its either the MAF or the ecu is doing something different as its not plugged in ?

[RedS-line]

BUMP for an update. Any fix? MAF replaced? please help i think my baby caught the same disease

[Anonymous A4]

BUMP for an update. Any fix? MAF replaced? please help i think my baby caught the same disease

I replaced the MAF but the problem is still there. I kinda gave up, I think it might be a software problem to do with the remap but not sure. I am going to bring it to get a fresh remap from another tuner

[yungcotter]

What tune do you have? Can't see sigs on my phone. But if it's ApR try switching it to stock mode drive around for a bit than switch back to your desired program.



Sent from my iPhone 4s using Tapatalk

[Anonymous A4]

Im honestly not sure what tune it is. I got it done a while back. Its definitly not a brand like you mentioned

[Anonymous A4]

Ok, I got the tune removed and then a different tune done and the problem is still there !!!! ARGHHH !!!! Has anyone any ideas ? What is the crack with having to upgrade fuel pumps ? I really am at my wits end now :(

[Salt n Peppa]

At what rpm's are you at when you encounter this fuel drop? I think you should try changing out the prv lile charles said, or the hpfp is just not keeping up... I find it hard to believe a catch can could "solve" any of this. To my understanding, it's just an alternative to the pcv to help cut the amount of junk that hit the valves, not really a fuel cut fix, but maybe I'm wrong? But that is definitely a part of the vacuum system. I could see changing it out to try and remedy the need to carbon clean as much, but even still it won't be eliminated completely anyways.

[Anonymous A4]

It appears to be when the turbo is kicking in but it only really dors it whilst under load eg. Fourth gear on an inclined hill at around 2500 rpm and keeps doing it until the revs get up. I have already replaced the PCV and it made no difference. I done away with the idea of the catch can.

[Anonymous A4]

Is there anyway of testing the injectors ? The tuning shop said it could be the veins in the turbo blocked but I would have thought that it would do that all the time then ? Ate TFSI prone to turbo vein stick ?

[Anonymous A4]

I meant ARE not ATE :)

[Anonymous A4]

Anyone ?

[Anonymous A4]

Oh well, maybe a firelighter and a match is the best thing for it :(

[iany]

Oh well, maybe a firelighter and a match is the best thing for it :(

did you ever get this sorted? i've got similar, here's what's been done so far..

Diverter valve
plugs
coil packs
redeem treatment

doesn't always happen, but always seems to be in 3rd where its most noticeable,more so under load, always in the mid 3k RPM. can't imagine its fuel as surely it would do that in second too?! diverter did make the most difference, seems to be better since then (previously it had gone completely flat at around 80mph in third, almost like the throttle wasn't working, only once though)

from what i know the car is on a stock map, no tinkering from me but can't say for previous owner, its on 56k miles, 09 plate. running 50/50 between super and normal unleaded.

[SmoothCriminal]

Did anyone ever mention his N80 valve? I've heard it can cause fuel cut out. If it is not working correctly it will not allow air to flow into the fuel tank in return slowing fuel flow.

[iany]

Did anyone ever mention his N80 valve? I've heard it can cause fuel cut out. If it is not working correctly it will not allow air to flow into the fuel tank in return slowing fuel flow.

just spotted the same story on another forum where he mentioned it was fixed and that it was the MAF...