Random Misfire issue.
 

VCDS-Lite Version: Release 1.0
Wednesday, 18 August 2010, 18:46:55:0


Chassis Type: 8D - Audi A4 B5
Scan: 01,02,03,08,15,16,17,25,35,37,45,55,56,57,67,75,76 ,77

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Address 01: Engine Labels: 06B-906-018-AWM.LBL
Controller: 4B0 906 018 CH
Component: 1.8L R4/5VT G 0001
Coding: 16001
Shop #: WSC 63351
2 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - - Intermittent
16686 - Cylinder 2: Misfire Detected
P0302 - 35-00 - - Intermittent
17536 - Fuel Trim: Bank 1 (Multi): System too Lean
P1128 - 35-00 - -
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
16685 - Cylinder 1: Misfire Detected
P0302 - 35-10 - - - Intermittent
Readiness: 0000 -1000

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Address 03: ABS Brakes Labels: 8E0-614-111-ABS.LBL
Controller: 8E0 614 111 B
Component: ABS/EDS 5.3 FRONT D10
Coding: 0273004283
Shop #: BB 24332
No fault code found.

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Address 08: Auto HVAC Labels: 8D0-820-043-1D.LBL
Controller: 8D0 820 043 Q
Component: A4 KLIMAAUTOMAT D58
Coding: 00140
Shop #: WSC 63351
No Faults Found
or DTCs not supported by controller
or a communication error ocurred

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Address 15: Airbags Labels: 8D0-959-655-AI8.LBL
Controller: 8D0 959 655 G
Component: Airbag Front+Kopf 1002
Coding: 00304
Shop #: WSC 63351
1 Fault Found:
01217 - Side Airbag Igniter; Driver Side (N199)
32-10 - Resistance too High - Intermittent

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Address 17: Instruments Labels: 8D0-920-xxx-17.LBL
Controller: 8D0 920 980 Q
Component: B5-KOMBIINSTR. VDO D12
Coding: 02244
Shop #: WSC 42202
No fault code found.

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Address 35: Centr. Locks Labels: 8D0-862-257.LBL
Controller: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16232
Shop #: WSC 63351
10 Faults Found:
01367 - Central Locking Pump Run Time Exceeded (Likely Leak)
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01372 - Alarm triggered by Door Contact Switch; Passenger Side or Rear
35-00 - -
01374 - Alarm triggered by Terminal 15
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01368 - Alarm triggered by Luggage Compartment Switch
35-00 - -
01366 - Opened Due to Crash Signal
35-00 - -
01362 - Close Switch for Tailgate/Trunk (F124)
29-00 - Short to Ground
01365 - Lock/Unlock Switch; Interior
29-00 - Short to Ground

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Address 45: Inter. Monitor Labels: 4B0-951-173.LBL
Controller: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00101
Shop #: WSC 63351
1 Fault Found:
01380 - Alarm triggered by Anti-Theft Sensor; Rear Left
35-00 - -

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Address 56: Radio Labels: 8D0-035-1xx-56.LBL
Controller: 8D0 035 195 A
Component: Radio D00
Coding: 00200
Shop #: WSC 63351
1 Fault Found:
65535 - Internal Control Module Memory Error
00-00 - -

End --------------------------------------------------------------------------------------------------


I have changed the spark plugs, ignition coils, fuel filter and some vacuum lines. I am also getting a higher voltage reading on Cylinder 2. I have switched the ignition coils around and Cylinder 2 always misfires. I havn't done a compression test on it yet. Autozone didnt have one today. Anyone think of why I keep misfiring? Also the misfiring happens more when at idle then when driving.

Unplug your maf and see if the symptoms disappear.

Stupid question but where is the maf. I know cars but not this new.

on top of the airbox. There is a seal that you pull out to expose the connector for the maf. Be careful, it's delicate stuff.

Okay I will try right now and clear the codes and run it to see if that fixes it. Anything else you want to add that could be causing this. I can also send you the misfire log I did earlier today.

If it's not the coils or the plugs, you don't have an ICM, so the maf is the next likely thing to cause misfires w/lean codes like you have.

Okay I am so confused where to unplug. Is close to the throttle body or by the passenger headlight?? I did unplug the 4pin cable on the throttle body. Closest to me. Car would not start without that. Tried the one by the headlight on top of the air box. After I did that the car would start but was misfiring like crazy and CEL was flashin. I could take pics and show you what I unplugged.

NVM, I found it. I didnt know it was in the black box under the big rubber grommet. I didnt clear the codes but it doesnt seem to misfire/shake as much if at all. I did break the clip that connects to the maf, it will still connect but wont lock. Is that going to be an issue if the maf is the cause of the misfiring and needs to be replaced? (The clip for the maf)

Yeah the black box is the airbox. If symptoms clear up with the maf unplugged I'd replace the maf. You can try cleaning the element inside the maf housing, but that rarely works. You should clear the codes and then start the engine with the maf unplugged, even drive it around the block a couple times and see what happens. The maf plug should stay plugged in without that clip that broke off. Told ya to be careful!

I didnt know how to take the clip off and ended up snapping it. I ran it unplugged with the codes cleared. Did not get a CEL yet. It feels like its misfiring and the computer says it is but no where near the amount it was before. I get a random in Cylinder 1 sometimes. Cylinder 2 is still misfiring though. Going to get a compression tester tomorrow. But I do believe that was the cause of the issues. Cause it runs better now. Oh whats the torque spec for spark plugs. I heard if you dont tighten them enough it can throw misfire codes. I know I didnt over tighten them cause I never do. I stripped one out on my Integra and it was a nightmare to fix it so I dont over tighten anymore.