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Author Topic: Idle rev  (Read 1667 times)

Offline Tal001

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Idle rev
« on: December 11, 2014, 07:44:14 pm »
Hi all

I have an issue where when the car is idle the revs go from 800 up to 2k. Today a engine light came on and a scan has shown P0171. This shows too much oxygen in the exhaust.

Any ideas?

I read it could be the DV or PCV?

Thank

Offline lukemk5gti

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Re: Idle rev
« Reply #1 on: December 11, 2014, 07:47:01 pm »
Not the dv. A split would only cause loss of boost with throttle down.

Could quite possibly be your PCV. Rougly €100 to fix

Offline GrayMK5GTI

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Re: Idle rev
« Reply #2 on: December 11, 2014, 08:00:23 pm »
PCV is a lot less than €100.

You can buy one for 40 British  pounds and even a child could fit one  :signLOL:
NOW: 2015 Golf R DSG 5 Door, Lapiz Blue, 19s, Discover Nav, Reversing Camera
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Offline Tal001

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Re: Idle rev
« Reply #3 on: December 13, 2014, 11:49:27 am »
Hi thanks for your replies

I tested the pcv by starting the car up and placing paper over the oil cap, the engine was sucking the paper in.  I Think the pcv is fine.

 Any ideas on what else it could be?

Saintsteve

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Re: Idle rev
« Reply #4 on: December 13, 2014, 04:47:49 pm »
Change the PCV.

£38 from a VW dealer.. That will be the problem.

Offline lukemk5gti

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Re: Idle rev
« Reply #5 on: December 13, 2014, 06:39:09 pm »
Hi thanks for your replies

I tested the pcv by starting the car up and placing paper over the oil cap, the engine was sucking the paper in.  I Think the pcv is fine.

 Any ideas on what else it could be?

Would you not change hoses and gasket while your at it no? Total cost came to I think €70 and although I'd do it myself labour might bring you up anothe €30 for 30mins work