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2001 s4 misfire

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 Post subject: 2001 s4 misfire
PostPosted: Mon Jan 16, 2017 6:27 am 
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Stuck in first

Joined: Sun Jan 15, 2017 1:28 pm
Posts: 2
Hey guys, i posted in the new members area by accident about my misfire, and it turns out i dont have permissions to see the new members area, so I cant read any replies. So i think i found the correct section to post about a misfire so ill just post again.

The car is a 2001 Audi S4 6 speed with 376 000 km. Misfire started about a week ago, it happens under light load, engaging the clutch from a start. It also misfires at wot. Maintaining a constant speed is nice and smooth. The idle is nice and smooth.

Scan for codes with stock ecu:

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

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.LBL
Controller: 8D0 907 551 H
Component: 2.7l V6/5VT G 0003
Coding: 06711
Shop #: WSC 06435
VCID: 2F1190BFFE05
9 Faults Found:
18057 - Powertrain Data Bus: Missing Message from ABS Controller
P1649 - 35-00 - -
17861 - Exhaust Gas Temp Sensor 1 (G235): Open or Short to Plus
P1453 - 35-00 - -
17865 - Exhaust Gas Temp Sensor 2 (G236): Open or Short to Plus
P1457 - 35-00 - -
17637 - Fuel Injector for Cylinder 5 (N83): Short to Ground
P1229 - 35-10 - - - Intermittent
16955 - Brake Switch (F): Implausible Signal
P0571 - 35-00 - -
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16689 - Cylinder 5: Misfire Detected
P0305 - 35-10 - - - Intermittent
16534 - Oxygen (Lambda) Sensor B2 S1: Malfunction in Circuit
P0150 - 35-00 - -
Readiness: 0010 0001

Scan with my buddies ecu: (meant for a bosch maf, i have hitatchi)

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

-------------------------------------------------------------------------------
Address 01: Engine Labels: None
Controller: 8D0 907 551 S2
Component: 2.7l V6/5VT G 0003
Coding: 06611
Shop #: WSC 87119
VCID: 6CAB47B30F93
16 Faults Found:
17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
P1114 - 35-10 - - - Intermittent
17548 - Oxygen (Lambda) Sensor; B2 S2: Internal Resistance too High
P1140 - 35-10 - - - Intermittent
17530 - Oxygen (Lambda) Sensor Heating; B2 S2: Open Circuit
P1122 - 35-10 - - - Intermittent
17526 - Oxygen (Lambda) Sensor Heating; B1 S2: Open Circuit
P1118 - 35-10 - - - Intermittent
16825 - EVAP Emission Control Sys: Incorrect Flow
P0441 - 35-10 - - - Intermittent
17953 - Throttle Valve Controller: Malfunction
P1545 - 35-10 - - - Intermittent
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
17524 - Oxygen (Lambda) Sensor Heating; B1 S1: Open Circuit
P1116 - 35-10 - - - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-10 - - - Intermittent
17637 - Fuel Injector for Cylinder 5 (N83): Short to Ground
P1229 - 35-00 - -
17861 - Exhaust Gas Temp Sensor 1 (G235): Open or Short to Plus
P1453 - 35-00 - -
17865 - Exhaust Gas Temp Sensor 2 (G236): Open or Short to Plus
P1457 - 35-00 - -
18014 - Rough Road/Engine Torque Signal from ABS: Electrical Malfunction
P1606 - 35-00 - -
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16689 - Cylinder 5: Misfire Detected
P0305 - 35-00 - -
Readiness: 0010 0001

I have changed injectors, i have swapped coils, i have redone the wiring for that injector, i feel like i have done everything to get rid of the misfire, is there something im missing guys? Thanks


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 Post subject: Re: 2001 s4 misfire
PostPosted: Thu Jan 19, 2017 7:40 am 
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mach 2 with my hair on fire

Joined: Sat Feb 12, 2011 2:52 pm
Posts: 1607
Looks like you have a problem (mouse chewing) with the main wiring harness, or an engine ground wire.

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 Post subject: Re: 2001 s4 misfire
PostPosted: Thu Apr 20, 2017 12:36 pm 
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Chirping second

Joined: Thu Jul 16, 2009 3:32 pm
Posts: 68
Location: London, UK
I'm tempted to say engine ground too, to test you could always use a couple of jump leads, engine to chassis and chassis to battery negative. Speaking of batteries, try swapping the battery for a known good one....


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