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General => The garage => Topic started by: Greeraidan on 27 April 2015, 07:40

Title: Idle problem
Post by: Greeraidan on 27 April 2015, 07:40

Hi everyone.. I bought a mk4 1.8t this weekend.. It needs a little bit of work but the main problem is it jumps up and down revs when idling, I know the exhaust is blowing so planning on getting a new one this week does anybody have any ideas what it could be if it's not the blowing exhaust?

Title: Re: Idle problem
Post by: itavaltalainen on 27 April 2015, 16:24

Get it scanned for fault codes....

Otherwise it might be a stab in the dark.

Where are you based?

Title: Re: Idle problem
Post by: Greeraidan on 27 April 2015, 20:32

I'm in Bradford, West Yorkshire..

Title: Re: Idle problem
Post by: itavaltalainen on 27 April 2015, 21:39

Bit far for me and not heading up that way for work in near future....
See if you can find someone more local to do a full auto scan on all control units for you ( https://maps.google.co.uk/maps/ms?msid=209563024277134815192.0004c505be14b22419dbe&msa=0&dg=feature )

Title: Re: Idle problem
Post by: LeeOxley on 02 June 2015, 17:18

Chances are it's a Throttle Body issue, may need cleaning or just renewing, or it could be as simple as the MAF sensor. Unplugged mine the other day to try a scooby air filter and revs bounced from 300- to 1400 constantly. How bad is the jumping?