Car not running very well

46 doctor46

46 doctor46

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After some advice if possible car has been running bad for a week now low boost over fuelling back firing engine management light on done a vcds scan last night and it brought up 4 faults all are for the lamba O2 sensor I understand there are 2 of these on my car is there any way of knowing which one is faulty or is it worth changing both is this part a main stealership part or are there any good aftermarket parts available my car is a 2001 a4 1.8t Quattro
 
I would check the coil packs first as they can cause false reading and the easy way is to take one off and see if she runs worse, if she does you know that one is good, put it back on and try another just to rule them out.
 
It runs fine on idle and normal driving but as soon as u ask a bit more from her she doesn't want to no feel it holding back and rdv seems to be a lot noisier plus the occasional back fire
 
Can you post the fault codes please, if its not coil packs or plugs then next step is check vacuum pipes (all of them inc 1 to dump valve.) , then oil pressure, then cam chain tensioner .

Very common fault on 1.8t,s also partially blocked cat can do it , if you have vcds it can tell you through measuring blocks which cylinders are misfiring and how many misfires per min which helps identify the fault.You can also read lambdas to see if its running weak (fuel trim )
 
Oh ok problem is I only had the vcds 3 days and have not got a clue how to work it managed to do a scan and will put codes up later but as to what u just said about measuring I not got a clue lol
 
Could be the cambelt timing ot turbo.

When was the belt last done as it could have jumped a tooth.
 
I would check the dump valve! Had a similar thing with mine, idled and runner ok but as soon as I put my foot down it lost power and juddered like it was missing. They do wear out and split over time. The OEM one isn't to expensive.
 
Last edited:
i was going to change the dv to a forge one anyway hoping to get under it this weekend and have a good look at it
 
Is there a flexi hose anywhere between the airflow meter and the turbo that can flex when the engine moves?
They can notorious for splitting, the split will usually be closed when idling, soon as you put the power on the engine moves and opens the split, and it runs like a bag of sh!t..

Plugs and leads, or coil packs in your case can beakdown under pressure too causing a misfire..
 
Save the fault codes to the log file(go to log file and open the scan results) then hold left click mouse button down and drag across over what you want to copy (the writing will turn blue) then right click over the blue and click copy then come on here click the left button so the cursor line is flashing click right button again and click paste.
 
Saturday,23,May,2015,22:05:55:08412
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 14.10.2.0
Data version: 20150311
www.Ross-Tech.com


VIN: WAUZZZ8EZ1A073697 License Plate: Y50 TAY
Mileage: 232390km-144400mi Repair Order:



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


Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
67 69 75 76 77

VIN: WAUZZZ8EZ1A073697 Mileage: 232390km-144400miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06B-906-018-AVJ.lbl
Part No: 8E0 906 018 B
Component: 1.8L R4/5VT 0004
Coding: 11701
Shop #: WSC 00000
VCID: 2757D155C5CDC8190F5-5122
WAUZZZ8EZ1A073697 AUZ6Z0A0055809

3 Faults Found:
17524 - Oxygen (Lambda) Sensor Heating; B1 S1
P1116 - 35-00 - Open Circuit
17511 - Oxygen (Lambda) Sensor Heating; B1 S1
P1103 - 35-00 - Performance too Low
17522 - Oxygen (Lambda) Sensor; B1 S2
P1114 - 35-10 - Internal Resistance too High - Intermittent
Readiness: 0010 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-517.lbl
Part No: 8E0 614 517 A
Component: ABS/ESP allrad D1320
Coding: 04275
Shop #: WSC 06435
VCID: 2649DC51C2C7D111343-5140

1 Fault Found:
01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
35-10 - - - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043
Component: A4 Klimaautomat 0508
Coding: 00000
Shop #: WSC 00000
VCID: 5EB9B4B1DA1749D13C3-5122

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8E2.lbl
Part No: 8E0 907 279
Component: int. Lastmodul RDW 0510
Coding: 00001
Shop #: WSC 00000
VCID: 6FE7F9752DBDD059875-4B04

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-84.lbl
Part No: 8E0 959 655
Component: Airbag 8.4E 3001
Coding: 0010602
Shop #: WSC 63351 000 00000
VCID: 74EDF619149BF3817A7-5140

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 F
Component: Lenksáulenmodul 0302
Coding: 00001
Shop #: WSC 63351
VCID: 36690C111267A191843-4B04

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8E2.lbl
Part No: 8E0 920 950 D
Component: KOMBI+WEGFAHRS. RB4 D14
Coding: 01400
Shop #: WSC 00484
VCID: 2A512861D6DFF57110B-5122
WAUZZZ8EZ1A073697 AUZ6Z0A0055809

2 Faults Found:
00562 - Sensor for Oil Level/Temperature (G266)
30-00 - Open or Short to Plus
01304 - Radio
49-00 - No Communications

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 8E0-951-177.lbl
Part No: 8E0 951 177
Component: Innenraumueberw. 0503
Coding: 00001
Shop #: WSC 00000
VCID: 6BDFED6519A52C79ABD-5140

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.lbl
Part No: 8E0 959 433 AK
Component: Komfortgerát T1B 0514
Coding: 06859
Shop #: WSC 63351
VCID: 7AF1D82166FF85F120B-4B04

Subsystem 1 - Part No: 8E2959802B
Component: Tõrsteuer.FS BRM 4.11

Subsystem 2 - Part No: 8E2959801B
Component: Tõrsteuer.BF BRM 4.11

Subsystem 3 - Part No: 8E0959801A
Component: Tõrsteuer.HL BRM 4.10

Subsystem 4 - Part No: 8E0959802A
Component: Tõrsteuer.HR BRM 4.10

3 Faults Found:
01134 - Alarm Horn (H12)
49-00 - No Communications
01560 - Passenger Door
61-10 - Won't De-Safe - Intermittent
00933 - Electric Window Motor; Passenger Side (V148)
62-10 - No or Incorrect Adjustment - Intermittent

End-------------------------(Elapsed Time: 06:27)--------------------------
 
Clear the faults , run the car then repost results please.
 
Engine codes relate to the same fault , knackered lambda sensor.
 
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