All Things Mk5 > How to Guides / Troubleshooting

erattic idle, what is a pcv and where is it?

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benje:
hi, mate has a audi a3 2.0 t that is eratic with tickover on idle but fine after, people say a pvc is a common fault but what is it and where is it on the car to block off and see if it makes a difference,

KRL:
Hi,

All the info you need will already have been posted.  Try searching, here would be a good place to start:
http://www.mk5golfgti.co.uk/forum/index.php?topic=8565.0
 :happy2:

jonnyc:

--- Quote from: benje on November 25, 2009, 06:07:05 pm ---hi, mate has a audi a3 2.0 t that is eratic with tickover on idle but fine after, people say a pvc is a common fault but what is it and where is it on the car to block off and see if it makes a difference,

--- End quote ---

A quick test is to have the car running.. Disconnect the front hose from the PCV that connects to the inlet manifold, and then block off the inlet manifold bung with your hand, if the idle settles then you know its a faulty PCV..

benje:
so in the picture what colour line do i disconnect?

jonnyc:

--- Quote from: benje on November 25, 2009, 07:46:31 pm ---so in the picture what colour line do i disconnect?

--- End quote ---

The hose with the green and red arrow on either side.. Disconnect that and then block off the inlet manifold (big plastic piece fixed to the front of the engine) with your hand..

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