Dirty throttle body, vacuum leak and weak battery.
Verify coil pack and wire set/plug.
Start with the basics.
Fresh Battery
TB cleaner.
Try to ADP after good massage.
Rectify miss.
#1
Okay so i just bought an Audi A6 Quattro 2.8l and it has some issues.
it has 87k on it and its a 99. its been taken care of timing belt was done at 80k oil changed every 3k and paperwork to prove it.
PO was dirving it and all of a sudden it started sputtering and bucking, he was 10 miles from home so he just drove it and parked it and then i bought.
the car starts and rev's to about 2k rpm and then bogs down.
UPDATE: so i took my spark plugs out to test compression and this is what i found... they were covered in oil? it was on the wrench too so i think its a valve cover gasket leak. its on both cylinders 1 and 4 i havent checked any others. what do you guys think? could it be valve seals?
here is the scan i did when i first got the car
Chassis Type: 4B - Audi A6 C5
Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
75 76 77
Mileage: 140460km/87277miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AHA.lbl
Part No: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR AT D04
Coding: 06252
Shop #: WSC 02325
VCID: 6CD3C083361B
7 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
17967 - Throttle Body (J338): Fault in basic settings
P1559 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
Readiness: 0110 1101
-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01V-927-156.lbl
Part No: 4B0 927 156 CE
Component: AG5 01V 2.8l5V USA 9604
Coding: 00000
Shop #: WSC 00000
VCID: 6CD3C083361B
1 Fault Found:
00526 - Brake Light Switch-F
27-00 - Implausible Signal
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-EDS.lbl
Part No: 8E0 614 111 A
Component: ABS/EDS 5.3 QUATTRO D10
Shop #: BB 24334
VCID: 1C33D043A63B
No fault code found.
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
Part No: 4B0 820 043 S
Component: A6-Klimavollautomat D62
Coding: 00160
Shop #: WSC 02325
VCID: 2A5F069BFC6F
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI8.lbl
Part No: 4B0 959 655 H
Component: Airbag Front+Seite 0002
Coding: 00106
Shop #: WSC 02325
VCID: 356525E725D1
3 Faults Found:
65535 - Internal Control Module Memory Error
00-10 - - - Intermittent
01217 - Side Airbag Igniter; Driver Side (N199)
32-10 - Resistance too High - Intermittent
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-919-xxx-17.lbl
Part No: 4B0 919 930 RX
Component: C5-KOMBIINSTR. VDO D18
Coding: 07262
Shop #: WSC 01078
VCID: 8F29370FE7CD
No fault code found.
-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
Part No: 4B0 962 258 J
Component: Central Lock/Alarm D33
Coding: 15885
Shop #: WSC 02325
VCID: 306B14F3DAB3
5 Faults Found:
01572 - Alarm triggered by Door Contact Switch; Passenger Side
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
00668 - Supply Voltage Terminal 30
07-00 - Signal too Low
01570 - Turn-Off Delay; Terminal 15
29-10 - Short to Ground - Intermittent
01482 - Motors for Central Locking
29-10 - Short to Ground - Intermittent
-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: None
Part No: 4B0 959 760 A
Component: Sitzmemory D05
VCID: 2B51039FF395
No fault code found.
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00001
Shop #: WSC 02325
VCID: E0CB24B34AD3
No fault code found.
-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 4B0 035 195 A
Component: Radio D00
Coding: 00117
Shop #: WSC 02325
VCID: 1E37DA4BB027
No fault code found.
End ---------------------------------------------------------------------
here is the engine scan after i cleared everything and scanned again
Address 01: Engine Labels: 078-907-551-AHA.lbl
Control Module Part Number: 4D0 907 551 AH
Component and/or Version: 2.8L V6/5V MOTR AT D04
Software Coding: 06252
Work Shop Code: WSC 02325
VCID: 6CD3C083361B
3 Faults Found:
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
Readiness: 0110 1101
----------------------------------------------------------
so i think i need a coil pack and maybe a throttle body?
i dont know about the throttle body though i thought i would just need to do a TBA but when i went to do it, it said error. maybe thats cuz of the misfire.
anyone's input would be great. thanks.
oh and pics
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#2
Dirty throttle body, vacuum leak and weak battery.
Verify coil pack and wire set/plug.
Start with the basics.
Fresh Battery
TB cleaner.
Try to ADP after good massage.
Rectify miss.
Jack Shapiro E.P.E. VAS>ASE Extern VST-3/1 LAB (TECH INQUIRIES ARE TO BE IN WRITING )
7076062 NYS DMV SAE>NASTF>VW-Audi GEKO Authorized
European Parts Emporium/Performance --- Immobilizer Solutions LLC --------
Postadresse: 1001 State Route 17K Montgomery New York 12549 USA
vwemporium@aol.com -845-457-9808 TEL 9AM-5PM --------TAKE CONTROL OF WHAT YOU OWN!!!!!!
#3
i got a fresh battery. i'm getting it in the garage tonight and i'll clean the throttle body.
and i dont think it will let me do an ADP with the misfire code still in the engine. (ADP is throttle adaption right?)
an i was gonna get a new coil pack is that what you were saying to do as well?
#4
UPDATE: so i took my spark plugs out to test compression and this is what i found... they were covered in oil? it was on the wrench too so i think its a valve cover gasket leak. its on both cylinders 1 and 4 i havent checked any others. what do you guys think? could it be valve seals?
![]()
#5
FOD for sure.
Fix that VC gasket![]()
Jack Shapiro E.P.E. VAS>ASE Extern VST-3/1 LAB (TECH INQUIRIES ARE TO BE IN WRITING )
7076062 NYS DMV SAE>NASTF>VW-Audi GEKO Authorized
European Parts Emporium/Performance --- Immobilizer Solutions LLC --------
Postadresse: 1001 State Route 17K Montgomery New York 12549 USA
vwemporium@aol.com -845-457-9808 TEL 9AM-5PM --------TAKE CONTROL OF WHAT YOU OWN!!!!!!
#6
Gasket is on the way from ECS and the Coil pack is on the way from Vortex Classifieds.
6 new plugs i had left over from another 2.8l are going into it and i will be cleaning the TB today while i wait for the parts.
i really hope this thing runs after this