MisFire 05 2.0T FSI - Not Coil Packs

[a8 tech]

Hi Aletank,

I have a similiar problem with misfire on #2, changed coils, cleaned injectors, lambda sensor - just got it back today as non-Audi mechanic doesn't know what else to do!

Word of warning, I've heard it's not a good idea to drive too far with a misfire as the unburnt fuel can damage the cat converter.

Keen to hear of a successful fix.

Post your fault code and I will tell you what to do, or if its the same as this

[a8 tech]

update

Engine ecu fitted and permanent fault codes for injectors cleared

Just need to tow to dealer to regenerate immo code in engine ecu

Vehicle:


Marque:
Audi
Type:
Audi A4 2001>
Model year:
2005 (5)
Body version:
Saloon

Engine code:
BGB 2.0l Turbo Motronic / 147 kW

Event memory 1:
01 - Engine electronics

8E0910115J

2.0l R4/4V TFSI

Coding long

Dealer number a8 tech

8E0907115C

H11

0080

1 Event(s) detected
01299 P0513 008

Incorrect immobiliser code

[aletank]

All fixed and on the road again !! a new ECU was required !

A Big Thank You to A8 Tech (Jon) for Quickly Diagnosing the problem and fixing it in a professional manner !
I couldn't recommend A8 Tech enough, a proper genuine guy that will go out of his way to help you !
Anythin he doesn't know about Audi's - It's not worth knowin !
Don't forget any little mods for you car he's the man to speak to, I know fitting Cruise Control is his most popular and favourite at the mo !

Thanks Again

[paranoid69]

I realise this is a very old thread so apologies for resurrecting it but it's very similar to a problem I'm having.
I have a 2005 2.0fsi BGB quattro avant on 124k miles. Over a long period it developed a slight judder when idling thats turned into a misfire, it can run very rough from cold but after warming up it'll settle down and run well especially at higher revs.
Basically the sequence is this:
Start from cold, runs really rough, at times can sound like its timing is out, almost backfiring.
After a minute or three on idle/3-4k revs it throws P0304 - Cylinder 4 misfire detected.
Once it warms up, especially if it's switched off and then started up again it'll run OK (can still hear a slight oddity in the engine sound at idle but the fault code clear and wont return while it's warm).
I have:
changed the coil packs and plugs.
Unplugged the MAF while running (makes no difference - does this mean the MAF is ok or not?)
Had compression checked - OK.
Had the induction side chemically cleaned to remove carbon build up - No change.
Had the (name escapes me) turbo waste gate with the rubber diaphragm that often fails checked - It's fine.
Local Audi specialist can't find the root fault.
I like the car in general and really don't want to see the back of it but will soon need something reliable due to a change of job, so unless I can find the fault it's days are numbered.
I've had the idea of injector 4 being faulty in some way, but reading this thread that's unlikely?
Anyone got any ideas?
cheers,
I.

[nicog]

Hello paranoid69!

I have exactly same problem as you. I have a 2005 2.0 TFSI BPG engine.

I have a cold start misfire when it's cold (below 6 degrees but sometimes below 10 degrees too). It is always cylinder N4.

When I start the car mornings and it's cold the RPM first stays on 1k. After about 5 seconds it begins to misfire, the RPM drops below 1K and i can feel it in the car. At this point I can push gas pedal so the RPM goes above 1000 - 1100 and the misfire goes away. After about 30 seconds i can turn the car of and on again and the RPM goes near 1200 and i can't feel any misfire in the car, but with vagcom I can log some of them on Cylinder 4.
After the RPM settles down there is no misfire to detect with vagcom any more and I can drive it with full power. Only at stops on traffic lights i can feel some vibrations in the car but i can log no misfire with vagcom.

I changed spark plugs, coil packs, engine mounts, air and gasoline filter but no improvements!
I checked engine on vacuum leaks, but everything is ok! I checked boost and gas pressure and there is everything ok.

I think also that it my be the Injector in Cylinder 4, but i'm not 100% sure.

Did you fix it already? If yes, What was it?

Thank you for your answer in advance

Nico

[paranoid69]

I had two issues, partially blocked oil pickup and 4th injector. Had the injector replaced and the modified oil pickup fitted.


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[nicog]

Thank you for your quick replay.
I will buy injector and will replace it! I made injector cleaning here in Georgia, but as I see the cleaning was not made as it must be!
Thank You
Nico

[emmaa5]

Our Mark said you posted on a forum so its a good job its this one.

The codes are from a snap on or bosch reader and there no good with vag com or vas pc for understanding what's going on.

If you can drive down to ours I will scan it properly for you and then let you now what's going on

If you can't drive it then I will come to you or get a vag com scan of address 01 plus the fuel rail pressure

here is a tip

first make sure you have the correct coil packs fitted

R4 2.0l FSI in-line
06D 905 115 K




Engine doesn’t run correctly.

Fault memory entry: sporadically/static misfiring.


Injection valves or ignition coils.

Measure

Before replacing any components proceed as follows:

Check the contacts on the injection valves and ignition coils.

Take off the plug on the injection valve/ignition coil.
Remove the plug contacts from the housing (for injection valves - see attachment-
Attachment 8871

not applicable to all vehicle types: press the plug out of the carrier - push back the clip A, pull up the secondary lock B, push up the clip C with ejector D and pull out the contact).
Place the plug contacts in turn on the pins of the injection valves/ignition coils. It must be possible to push on the contacts while they cling on strongly. The contacts are so-called high pressure contacts, they are used so that sufficient contact is made at high temperatures and vibrations. Contacts easier to push on must be replaced

Sorry to jump onto the thread but I am also having the same issues, misfiring on #2, swapped them about.. new pack.. still doing it and the specialists are baffled as to what to do next apart from an engine rebuild. I'm just wondering where you are based to possibly come to you before forking out approx £3000 for a rebuild.

[Defected]

Hi A8 Tech, I have a similar problem on my S3 2.0 TFSI (8P) from 2010 engine code: CDL
The missfire is on Cyl 3. swapped coil packs, fitted new plugs, checked follower, tried fuel pump from TTS with the same engine, changed a split brake booster vacuum hose.
Faults codes are:
P2177 System too Lean Off Idle, Bank 1
P0300 RandomMultiple Cylinder : Misfire Detected
P0303 Cyl.3 - Misfire Detected
P0087 Fuel Rail System Pressure - To Low
We have a workshop but my speciality is another manufacturer. Looking to sell it then this fault pops up! Do you do call outs? I’m in west London. Cheers, Howard