2.0 FSI Fast idle on cold start

[mattchuu]

Hi All,

I have a MK5 2.0 FSI which i now need to fit in a very narrow drive with some technical reversing needed around some posts.

The car has a fast idle on cold start which lasts for about 2.5-3 mins where it sits at 1500, the throttle works well and it doesn't hunt - just idles really fast.

The problem is that it's almost out of control in reverse at 1500rpm and the other half has already had a couple of close calls with the posts.

The car exhibits no other symptoms after the cold start, and never hunts or idles rough.

My first thought is the MAF isn't warming up quickly enough or there is a faulty temp sensor somewhere...

Any thoughts on what to replace first? no codes have been logged...

Edit:
Thanks JC, mine is a non-turbo DSG as well...

[JustCruisn]

Same on my wifes car the 110kw non turbo 2.0 fsi with auto box.
Lots of brakes when reversing out to keep it sane. My 2.0t does not do this.

Sorry i have no advice but keen to hear what others think.

Sent from my LG-D802T using Tapatalk

[Umai Naa!!]

Check the PCV pipes on the front of the motor. Hard to see as the main one is buried behind the intake manifold, but they do snap off, causing some weird running problems.

Also pop the intake pipe off the throttle body and check that the T/B isn't gummed-up or sticking open.

[AdamD]

My 2.0 FSI only runs fast for about 45-60 seconds before the idle drops to near-normal (well below 1,000rpm), so it's certainly not an issue that affects them all equally. I always leave it in park until the idle drops to avoid any difficulties reversing.

[MEL744]

My 2.0 FSI only runs fast for about 45-60 seconds before the idle drops to near-normal (well below 1,000rpm)

Mine does exactly the same