Rough idle

[Mr_Orange]

- turns out my front lambda sensor was completely dead, no voltage coming out at all.

Got that replaced today and oh my what a difference, car seems to be running perfectly!

What was the pain $$$$$ ?

[radz]

Part itself cost around £60 for a bosch, but I didnt have time to do it myself >.<

So overall cost me £120 which still isnt too bad if it fixes the problem.

[Mr_Orange]

Just stripped off and cleaned out the vacuum systems under the inlet manifold. 

It was full of gunge!  The suction jet pump, most of the pipework and the crankcase breather valve (puck thing) were thick with it.  No obvious pipe splits but some of the hoses had deteriorated quite badly inside.

With it all apart I noted down some useful numbers for the AUM:
Crankcase valve (puck)  034129101B
Suction Jet Pump  058133753B
PCV valve  035103245A
The "soft" pipes that have gone bad: 06A103247, 06A133784P, 06A133783AS, 06A133783H

Didn't sort the idle.....  I admit defeat and will be seeking further help.

[johnson6672]

Can you post some pics of what you cleaned?

[Mr_Orange]

Removed and cleaned out this little lot:


This creamy gunge is what spilt out when I removed the pipework:

[T_J_G]

You need a catch can mate! Sod paying VW prices for all those pipes when they can be replaced with a fresh looking catch can install:



EDIT: What ones you got to replace mate?

[Mr_Orange]

The 3 soft (not solid plastic) ones will be coming back out.

[johnson6672]

Think i might have a look at that lot when i do my service.

[Mr_Orange]

Think i might have a look at that lot when i do my service.

Its rather fiddly and depending on age/mileage they will likely be very manky.  I spent 3 hours doing this today.  Cutting off the original hose clips, it took about 12 jubilee clips to put it all back together.  Would have been nice to find a great big split in something, but hey-ho....