MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: northyracing on March 07, 2013, 08:22:28 pm

Title: whats an N80 valve
Post by: northyracing on March 07, 2013, 08:22:28 pm

whats an N80 valve and what does it do could this be the thing thats causing my juddery idle as i have changed PCV, DV coil packs and plugs

Title: Re: whats an N80 valve
Post by: Saintsteve on March 07, 2013, 09:32:56 pm

Can u post a vid of what your suffering from? Rev counter etc

Title: Re: whats an N80 valve
Post by: northyracing on March 07, 2013, 09:38:08 pm

cant seem to post pics or vids but basically once car has been driven and warms up once you pull up to lights etc the car idles fine then a slight juddery feel like a missfire but the rev counter does not budge and in slow traffic you can feel a juddering at low speeds then once the boost is up and speeds up its fine

Title: Re: whats an N80 valve
Post by: Saintsteve on March 07, 2013, 09:48:41 pm

Quote from: northyracing on March 07, 2013, 09:38:08 pm

cant seem to post pics or vids but basically once car has been driven and warms up once you pull up to lights etc the car idles fine then a slight juddery feel like a missfire but the rev counter does not budge and in slow traffic you can feel a juddering at low speeds then once the boost is up and speeds up its fine

Get it logged..

VCDS will find out whether you have some sort of coil pack misfire occurring .

Title: Re: whats an N80 valve
Post by: northyracing on March 07, 2013, 09:57:51 pm

thats the only thing i dont have VCDS would a normal say snap on diognostics machine do the same thing as the VCDS as he can get a live reading of the car running

Title: Re: whats an N80 valve
Post by: northyracing on March 08, 2013, 06:43:11 pm

had the car plugged in today no problem with anything no codes atall no misfires but still idles really bad so dont know what route to take now

Title: Re: whats an N80 valve
Post by: Saintsteve on March 08, 2013, 07:50:53 pm

Quote from: northyracing on March 08, 2013, 06:43:11 pm

had the car plugged in today no problem with anything no codes atall no misfires but still idles really bad so dont know what route to take now

Then if nothing is flagging electrically,  then next step would be compression check,  emission test to check the weather high your hydrocarbons are. Or see if you have injector issues logging live cylinder misfires etc

Title: Re: whats an N80 valve
Post by: northyracing on March 08, 2013, 08:17:08 pm

we ran a live reading and everything was running as it should nothing stood out no missfireing found very strange

Title: Re: whats an N80 valve
Post by: doylebros on March 08, 2013, 08:31:40 pm

Have a read of this it may help you

http://www.golfmkv.com/forums/showthread.php?t=119267