MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Pikey Motorsports on November 10, 2014, 08:11:57 am

Title: Idle hunting
Post by: Pikey Motorsports on November 10, 2014, 08:11:57 am
Ive always had abit of idle hunting when cold with the rs4 injectors but yesterday its staying permanent and afr gauge is showing rich on idle.. Car sometimes hesitates alittle bellow 2,000rpm but only sometimes and very slightly

Car is fine on wot and so are afrs, im thinking some kind of vac leak or sensor problem, flapper motor?

Anyone got any ideals

Cheers

P.s had a new catback the day before.. Was fine that night when i took it out to test and then the next day i had this issue. I dont think its related to the exhaust though
Title: Re: Idle hunting
Post by: Pikey Motorsports on November 10, 2014, 03:30:23 pm
Any ideals anyone?
Title: Re: Idle hunting
Post by: vRSAlex on November 10, 2014, 04:51:30 pm
Get it smoke tested to eliminate all leaks.
Title: Re: Idle hunting
Post by: cuprajake on November 10, 2014, 05:25:59 pm
alex do you have a guide on were to smoketest the 2.0tfsi?

do you have to block certiain pcv like the 1.8t?
Title: Re: Idle hunting
Post by: vRSAlex on November 10, 2014, 06:30:02 pm
alex do you have a guide on were to smoketest the 2.0tfsi?

do you have to block certiain pcv like the 1.8t?

I just pop the air filter off and go through the intake pipe.  It doesn't run that much pressure so doesn't always show minor leaks.  Nothing needs blanking off.
Title: Re: Idle hunting
Post by: Pikey Motorsports on November 10, 2014, 06:53:52 pm
Ok alex cheers.. I just plugged it into vagcom and got a camshaft timing adjustment fault

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fluke435%2FMobile_Uploads%2Fimage_zps2cd4c4cb.jpg&hash=553ddcd13f6633c4fdd0d2e0dc814d0c2a10eeb6)

and then found this

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fluke435%2FMobile_Uploads%2Fimage_zpsbc708796.jpg&hash=f6b3f69a16f9624aa326e442460406942d284233)

Also found a fault for leak in air intake system


Title: Re: Idle hunting
Post by: Pikey Motorsports on November 10, 2014, 08:25:37 pm
Its the n205 sensor right alex? How do i remove it dude
Title: Re: Idle hunting
Post by: vRSAlex on November 10, 2014, 10:44:20 pm
That's been broken and glued up before. It just has two screws. T-15 or T-20.  Have a rag as some oil will come out if it. Around £100 iirc.
Title: Re: Idle hunting
Post by: Pikey Motorsports on November 10, 2014, 11:41:13 pm
I thought it looked like it had been glued.. Hopefully will fix the problem but not sure as also has the leak in air intake fault.. Either way it needs replacing and im sure its not helping the prob