gregorydouglas89

hey chapstick,

here is my excel file

chapstick

Surprising there weren't any misfires in the log.

Engine stumbling, misfires, codes associated and most commonly - nothing at all until you get too many bits of metal either punching through the cam housing as such high velocity. Or the cam pieces running through your engine, ruining it.

The duty % should be ten percent or more lower as I said in the earlier post. Look at my duty cycle compared to yours. You still have life in it, but it's dying slowly. When it starts hitting the nineties consistently then you really need to swap it for a new one. Not a very difficult procedure - there's diy all over the internet.

Fuel rail pressure: There's a little too much descrepancy at certain points of the log. Look at towards the end of your log starting at line #2369 for a good example. A positive difference means you don't have enough fuel in the rail against the specified amount and negative - too much.

This could point to the fuel regulator valve your N276 part # 06D130757C considering you have the dtc P310B. This I would definitely check, they're pricey for a little peace of metal.

Something else screams attention in that log that relates to your post below...

Means too much air is being read...

The Lambda control % (block 033) should have active values in it bouncing +/-. Yours stays absolutely zero throughout the entire log - that's implausible. UNLESS you just deleted all the codes and there hasn't been enough miles cycled to get a reading.

Something might be wrong with your O2 sensor. You need to check both O2 sensors with vag com. The procedure is:


Measure value block 043: Basic setting
Lambda probe aging after cat., bank 1
- Function 04 (Basic setting)
- Activate short trip
- Press brake pedal and at same time press accelerator pedal down fully:
- Engine speed automatically adjusts to 1800 rpm -> "Test ON"
- Wait for "B1-S2 OK" to appear in the 4th field.
1)Engine speed [rpm]
2)Exhaust/cat.temperature bank 1 [°C]
3)Lambda probe voltage bank 1, probe 2 [V]
4)Result [Test ON / Test OFF / B1-S2 OK / B1-S2 n.OK]
or [Test ON / Test OFF / B3-S2 OK / B3-S2 n.OK]

the above procedure is for the post cat. You want to check the precat as well. That is MEASURING BLOCK 034 and is the same procedure as the above.

This is done in PARK and with the car at operational temperature. The test will show test off at first and after a while Test ON should result in BNK1-SxOK (everything works) or BNK1-SxN.OK (sensors bad).

The test takes a few minutes.

Pain in the *** these cars I know. Let me know how it goes and definitely consider checking that N276.

gregorydouglas89

hey chapstick,

where do i buy that n276 valve.

the o2 sensor code is actually on but i didnt think its a big deal because i thought it was misfiring was what may have caused it

gregorydouglas89

Hey chapstick

here are the latest check engine codes:

--------------------------------------------------------------------------
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 219962 km
Time Indication: 0

Freeze Frame:
RPM: 4650 /min
Load: 51.7 %
Speed: 0.0 km/h
Temperature: 94.0°C
Temperature: 38.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.589 V

000772 - Cylinder 4
P0304 - 001 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 219962 km
Time Indication: 0

Freeze Frame:
RPM: 4650 /min
Load: 51.7 %
Speed: 0.0 km/h
Temperature: 94.0°C
Temperature: 38.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.589 V

012555 - Low Pressure Fuel regulation
P310B - 004 - Fuel Pressure Outside Specification - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 219962 km
Time Indication: 0

Freeze Frame:
RPM: 718 /min
Load: 21.2 %
Speed: 0.0 km/h
Temperature: 99.0°C
Temperature: 57.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.335 V

012555 - Low Pressure Fuel regulation
P310B - 008 - Fuel Pressure Outside Specification - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 6
Reset counter: 255
Mileage: 219969 km
Time Indication: 0

Freeze Frame:
RPM: 4698 /min
Load: 100.0 %
Speed: 101.0 km/h
Temperature: 93.0°C
Temperature: 34.0°C
Absolute Pres.: 1010.0 mbar
Voltage: 13.843 V

008342 - Post-Catalyst Oxygen (Lambda) Sensor Correction; Bank 1
P2096 - 002 - Too Lean - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 219979 km
Time Indication: 0

Freeze Frame:
RPM: 2827 /min
Load: 48.6 %
Speed: 105.0 km/h
Temperature: 94.0°C
Temperature: 21.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.097 V

000665 - Boost Pressure Regulation
P0299 - 002 - Control Range Not Reached - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 220062 km
Time Indication: 0

Freeze Frame:
RPM: 2574 /min
Load: 87.0 %
Speed: 98.0 km/h
Temperature: 92.0°C
Temperature: 35.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.843 V
------------------------------------------------------------------------
------------------------------------------------------------------------
Checking o2 sensor at using measuring blocks

Address 01: Engine (8E0 910 115 M)

08:03:50 Group 043: Lambda Regulation (befor Catalyst - Basic Setting)
720 /min Engine Speed
300.0°C Catalytic Converter Temperature
0.02 V Bank 1 Sensor 2 Voltage
B1-S2 OK Result Lambda Aging


Address 01: Engine (8E0 910 115 M)

08:04:24 Group 043: Lambda Regulation (befor Catalyst - Basic Setting)
760 /min Engine Speed
354.0°C Catalytic Converter Temperature
0.02 V Bank 1 Sensor 2 Voltage
B1-S2 OK Result Lambda Aging

-------------------------------------------------------------------------
-------------------------------------------------------------------------
checking the o2 using your method

Address 01: Engine (8E0 910 115 M)

08:05:28 Group 033: Lambda Regulation
0.0 % Bank 1 Lambda Control
1.74 V Bank 1 Voltage of Oxygen Sensors

pics in attachment

chapstick

Hey Greg, try to run the test while on a drive. I just went out and noticed that the 034 block didn't give me a reading while I was in park so I went for a quick drive on local roads and maxed speed at 55mph and not too many lights. You can see after 619 seconds sensor 1 passed...odd how it takes more effort than post cat sensor. Note: during the drive you should see "test on" and "test off" back and forth. Be careful while you're logging!



The O2 sensors play a pivotal role in the controlling of air/fuel ratio for combustion. if you ever want to know more read up on fuel trim.

Again when I was studying your CSV file on Excel I just happen to notice that block 33 was not reading anything. While I was out testing my precat sensor I even "cleared all fault codes" and immediately after block 33 was showing lambda adjustments on vagcom. So something is up with yours I'm pretty sure.

This is just after I cleared codes and you can see Lambda % adjustments to fuel trim like crazy. Naturally, it should not be zero'd for the entirety of your log.


Re: N276 valve Part # 06D130757C, about seventy bucks w/o shipping. If you're in a hurry go to your local audi dealer. If not ECStuning dot com has pretty quick shipping and JHMmotorsports dot com is okay too. Europaparts dot com has theirs for 65bucks . I'm pretty sure your in the states. Just so you know, many have swapped out their n276 to no avail when it comes to strange fuel issues. But in your case you do have the right code, but that 0 lambda% has me concerned. On the flip-side of this is that you didn't get a code for an implausible signal or short to ground etc. for a bad O2 sensor. But you DO have a code for the post cat indicating the system is too lean which in-turn should make your lambda% in the high (+) values (meaning the O2 sensor control is making fuel trims richer by opening the injector timing more), but you are getting zero.

So run that sensor 1 test again while driving like I did - I'd do this before buying the valve. If after twenty or thirty minutes and you don't get an "OK" then something is wrong.

If you do, then something is else is causing lambda from adjusting...Aren't you glad you got an Audi.

gregorydouglas89

hey chapstick,

no i aint glad i have an audi i give up on them

anyway i have not erased the check engine light for the past 2 weeks. but would the o2 sensor cause the car to be misfiring like that.

chapstick

A faulty o2 isn't going to help that's for sure. I want to stick with traditional thinking and that it's caused by an electric issue. Unless you're good in that area I'd say it's time to go to a reputable audi/vw mechanic.

gregorydouglas89

hi chapstick,

this is what i got so far with the o2 sensor

chapstick

okay, there's some confusion sorry. I should've been more explanatory. We've already seen that lambda% is still at zero. So you need to run a check on bank 1 O2 sensor 1. You've already got sensor 2 confirmed. In order to do the test you need to go to measuring block/ group 34/ and proceed with a drive while logging. "Test off"and "test on" will flip back and forth. If after thirty minutes of driving you don't get "B1 S1.OK" then there's something wrong at that sensor.

Witchhunt

it seems like 05-07 we're the worst Audi ever built
maybe the engineers were from a temp agency in New Dehli