dealer recognises misfire but no codes

[lengster1]

They all do it ubtil warmed through,better fuel helps though

[mof777]

it wasnt like that when i got it so theres defo something wrong. it practically chugs along when cold as if its being starved.

im nowhere near mrc so really cant get it there

[nihc]

The first thing I would do is a TBA ( Throttle Body Alignment) using Vag-Com or via a dealer.
Officially a TBA should be done each time the battery has been disconnected. This is rarley done at dealers after any work.

If a TBA isn't done, then, the ECU doesn't know what position the throttle butterfly is at.

Also, I would check out your Fuel Trims using Vag-Com or via a dealer. Make sure that you don't reset the engine faults first as this clears the fuel trim values.
You can learn a great deal from the fuel trims.
Actually, I would always check out the fuel trims, before doing anything else.

Regards, Chris.

[sar]

sar

have you had carbon clean? i see that you are north east so would be interested who did it for you

yer i have had two now, one at 30,000 and one at 60,000 both done at mrc (was also having other work done at same time).
if you want someone in the north east, revolution in newcastle will do a carbon clean.
where abouts you from?.

[adsgreen]

The first thing I would do is a TBA ( Throttle Body Alignment) using Vag-Com or via a dealer.
Officially a TBA should be done each time the battery has been disconnected. This is rarley done at dealers after any work.

If a TBA isn't done, then, the ECU doesn't know what position the throttle butterfly is at.

Also, I would check out your Fuel Trims using Vag-Com or via a dealer. Make sure that you don't reset the engine faults first as this clears the fuel trim values.
You can learn a great deal from the fuel trims.
Actually, I would always check out the fuel trims, before doing anything else.

Regards, Chris.

+1

[lengster1]

Yes i remember explaing to Doug it was like it needed more choke mines also had 2 carbon cleans,tuning amplifies the standard characteristic imo,if the OPs car is stock maybe there is an issue,e46 m3s are similar until warm also.

[lengster1]

You ever had a fuel filter done? Its often overlooked as part of servicing.

[mof777]

from south shields sar so revolution would be ok for me - i knew they had done one at least but dont know how many cars theyve cleaned

lengster1 - ive just ordered a fuel filter and at a stab in the dark ive ordered sparks also. however theres some logic to my stab in the dark as i think most other faults should throw a code except for carbon build up

[mof777]

HANG ON - question - anyone had the carbon clean done because of the symptoms i have though?

or is the carbon clean kind of routine maintenance as we all know its there

[The_Coat]

The first thing I would do is a TBA ( Throttle Body Alignment) using Vag-Com or via a dealer.
Officially a TBA should be done each time the battery has been disconnected. This is rarley done at dealers after any work.

If a TBA isn't done, then, the ECU doesn't know what position the throttle butterfly is at.

Also, I would check out your Fuel Trims using Vag-Com or via a dealer. Make sure that you don't reset the engine faults first as this clears the fuel trim values.
You can learn a great deal from the fuel trims.
Actually, I would always check out the fuel trims, before doing anything else.

Regards, Chris.

Is all this east stuff to do on VAGCOM?

Mine runs a little lumpy when cold but I just wait a minute or so now till the revs drop and its fine.

[nihc]

The first thing I would do is a TBA ( Throttle Body Alignment) using Vag-Com or via a dealer.
Officially a TBA should be done each time the battery has been disconnected. This is rarley done at dealers after any work.

If a TBA isn't done, then, the ECU doesn't know what position the throttle butterfly is at.

Also, I would check out your Fuel Trims using Vag-Com or via a dealer. Make sure that you don't reset the engine faults first as this clears the fuel trim values.
You can learn a great deal from the fuel trims.
Actually, I would always check out the fuel trims, before doing anything else.

Regards, Chris.

Is all this east stuff to do on VAGCOM?

Mine runs a little lumpy when cold but I just wait a minute or so now till the revs drop and its fine.

http://www.ross-tech.com/vag-com/cars/throttlebody.html
http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info - the trims are in Group 32

[The_Coat]

The first thing I would do is a TBA ( Throttle Body Alignment) using Vag-Com or via a dealer.
Officially a TBA should be done each time the battery has been disconnected. This is rarley done at dealers after any work.

If a TBA isn't done, then, the ECU doesn't know what position the throttle butterfly is at.

Also, I would check out your Fuel Trims using Vag-Com or via a dealer. Make sure that you don't reset the engine faults first as this clears the fuel trim values.
You can learn a great deal from the fuel trims.
Actually, I would always check out the fuel trims, before doing anything else.

Regards, Chris.

Is all this east stuff to do on VAGCOM?

Mine runs a little lumpy when cold but I just wait a minute or so now till the revs drop and its fine.

http://www.ross-tech.com/vag-com/cars/throttlebody.html
http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info - the trims are in Group 32

Cheers, will take a look at this