Audi A5 Forum & Audi S5 Forum banner
1 - 12 of 12 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter · #1 ·
Hi All,


I have previoulsy been a TT owner on Mk1 and Mk2 TTS and had many cars over the last 15 years. I have not owned a car for the last 4 years due to house purchase, now i am changing jobs and going back to working at sea ) 3 months away and 3 months home... :)


I Bought my 2007 plate Audi S5 last week, Bearing in mind the following...

1. No service history
2. No second Key
3. Steering Noise
4. Rear bumper has been resprayed and can see orange peel affect if looked close
5. Front Passenger arch half missing


I drove the car away and almost got home before the EML came on...

Plugged in to check the fault and found cylinder 4 missfire..

Due to work i had no time last week to play with the new toy, so i sent it to my local 5* rated garage. They found the steering rack fixings loose and cylinder 4 coilpack faulty/ fixed..

Next day the engine is flashing EML intermitantly with no DS codes reading.

Yesterday i completed a Oil filter / Oil and Air filter service and checked Spark plugs for condition and type.

All looked ok and the same type as my replacement type (NGK plat)


Today, i went for a drive and found another 2 cylinders missfire and Pack A ????


im confused to what Pack A means, i Guess its side A which would be cylinders 1-4 but unsure.

Im gona have a play tomorrow and look at ordering the rest of the 7 coil packs due to the common fault with them.


I have also found out now that the undercover for the engine is missing / the car has been lowered with springs only... .. .. . ..
Any advice and experience appreciated.

Thanks as always

Christopher White
 

Attachments

·
Registered
Joined
·
848 Posts
I would have it walnut blasted for piece of mind. NA direct injection engines clog up the intake valves from the oil breather that ends up coking up the valves, and the valves get coked up because of direct injection. On old port injections the valves get washed with petrol for every intake stroke so not a problem there. I wouldn't be surprised to see poor performance because of this. Depends on mileage of your car of course but I would, as I said, had it walnut blasted for piece of mind.

Nice sepang blue car!
 

·
Registered
Joined
·
69 Posts
Welcome to the forums and lovely colour!

Do you get a rough idle or intermittent stutter when your engine is cold?

Did the faulty coil pack have signs of burnt oil in it?

You could try the fuel filter before considering new fuel injectors, but that starts to get quite expensive!

Sent from my SM-G973F using Tapatalk
 

·
Registered
Joined
·
95 Posts
Agree on the great course!
As the others have said. Carbon clean, spark plugs and filters. If still an issue, I have a set of injectors I can't go of on the cheap that I replaced when I had the engine swap on my S5.

Sent from my SM-G985F using Tapatalk
 

·
Registered
Joined
·
8 Posts
So the car has been apart or considerably damaged?

I'd start with getting it on some proper diagnostics, not just a code reader, definitely before doing all 8 ignition coils.
 

·
Registered
Joined
·
5 Posts
Discussion Starter · #6 ·
Thanks for your replies guys, I suspect carbon build up as mentioned and have started removing the intake to check the condition of the intake. I found 2 spark plugs which were bosh multispark type and the rest had ngk platinum. I have replaced all now with ngk platinum, it could of been this which was the issue but want to make sure nothing else is wrong while I'm shipping things down.


As for when the problem started recently it was when I did more then 3 miles drive.. I hope the injectors are OK ect but again best for a carbon clean / inspection to see the condition.

The plan is to inspect and clean the intakes and check everything else connected while it's removed and then if problems continue take it to audi to have a check. The problem is, I've had it in a decent garage who are audi specialists and they could only find 1 coil pack faulty...


I had an issue removing the fuel lines from the high pressure fuel pumps. It was wierd as they had to be removed by a spanner all through the thread..

Then I found a damaged connection which fell apart when removed.

I'm not entirely sure what it is, it looks like a filter or possibly a non return valve.

It's the brass connection which comes off the larger size 17mm connection from fuel pump.

I need to replace it and possibly if it's easy to get hold of il replace them all.

I've phoned around and euro / gsf don't know the part and said go to audi but they are closed today. I will try call tomorrow but would be good if anyone knows anywhere else ?

I hope I don't need to replace the fuel pump as that's a f... lot of money

180569
180570
180571
180572



Thanks

Chris
 

·
Registered
Joined
·
5 Posts
Discussion Starter · #8 ·
I have no idea what it is, it is the connection off the high pressure fuel pump. It could be a regulator but as I have no schematic of the components I do not know the component.. 🤔
 

·
Premium Member
Joined
·
3,113 Posts

·
Registered
Joined
·
1,395 Posts
done some research, and found some similar parts online which looks to be the same part. Cant check until audi service is open tomorrow...


That part is not compatible on your car. Engine code CAUA. There is a pressure relief valve 06D130757 £48.72 and 2x similar looking adaptors 079127065A £15.96 ea but if your car is built pre nov 2008 then the part numbers are different. Again it depends where that part you have is fitted.
 

·
Registered
Joined
·
4 Posts
Welcome and loving the colour and wheel combo!

No expert but when you mentioned you almost got home before the CEL came on that sounded too familiar so thought I’d chime in and share, picked up a 3.2 Quattro (not a 4.2 unfortunately) not too long ago with around 189,000kms, CEL came on on the way home, had a few air-fuel ratio imbalance, MAP and camshaft position sensor faults, eventually removed the throttle body and cleaned it with throttle body cleaner and an old toothbrush, reassembled and ran an adaptation / recalibration of the throttle position and (touch wood) have not had the CEL come back to visit yet. Probably could do with a bit more TLC with carbon cleaning and injector cleaning etc (feel it might be running abut rich) but I guess giving the throttle body a clean and reset was a cheap and easy fix for my issue
 
1 - 12 of 12 Posts
Top