MK5 TDI Idling high

[jamie88]

i had this problem, scanned it and it was the intake manifold flap. replaced it with a new one from the uk $300 not $800 that local vw wanted to charge. and haven't had a problem since.

[Greg Roles]

Caused by EGR/ blowby buildup. Shame you have decided to remove the Provent, will happen again eventually!

[jamie88]

the egr and manifold flap have always been clean in my car, egr is coded out by revo, and the engine has little blowby. my manifold flap failed internally, a gear slipped and threaded itself. the intake manifold has never been cleaned and is virtually spotless too.

[Greg Roles]

Ahh coding out the EGR was a good move. As you dont have a DPF you can get by without a Provent, I'll leave you alone. I am getting Viezu to code down the EGR in any diesel tunes I do.

[jamie88]

yeah when the tuner asked i told him i definitely wanted egr coded out. such a good move. and no dpf, I'm one of the lucky ones ! no further mods needed haha!

[asa572]

yeah when the tuner asked i told him i definitely wanted egr coded out. such a good move. and no dpf, I'm one of the lucky ones ! no further mods needed haha!

Tell me more about getting the EGR coded out please!

[nissman]

Yep, pretty likely. My TDI idles high from time to time without doing a regen, but I have messed with the engine so much, it could be anything. It is never an issue, but I your case I would put it down to the EGR, causes a lot of weird problems, gums up flaps, have you ever spray cleaned it out with intake cleaner?

Haven't tried spraying intake cleaner. I was thinking of pulling it apart and cleaning it out though. Anyone have any tips on this any hidden screws etc.

Regards

Simon

[jazd]

yeah when the tuner asked i told him i definitely wanted egr coded out. such a good move. and no dpf, I'm one of the lucky ones ! no further mods needed haha!

So ****ing over my DPF. Bloody light came on again today.

[jamie88]

from what i understand about getting it coded out it was just a box they tickd while doing the revo tune. not sure about other tuners but its very possible as revo arent a HUGE name.
how do you spray inlet cleaner guys,
do you take the boost hose off the inlet flap motor and just squirt a bit in?
or do you spray it up the top just after the map at that inlet?

[nissman]

Have taken apart the egr/intake flap assembly today to check it. Found it to be much cleaner than expected. I cleaned it wit a bit of wd40 I had handy and an air hose. The intake flap was checked by hand and moves freely from open to close. After reinstalling I checked whether the Intake flap is closing when ignition is turned on. I found it was only moving about 3mm when cycling between on and off.
Can anyone tell me whether this is normal?? When the ignition is set to the on position(but not started) should the flap "completely" close, or only move a little bit like it is doing??










Regards

Simon