MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: w357yuk on January 19, 2020, 11:07:09 pm

Title: Rough idle ??
Post by: w357yuk on January 19, 2020, 11:07:09 pm

Car runs rough on idle lately,  been googling and see it could be failed PCV?

I have taken dipstick out and seems to run lumpy?

Also taken oil cap off which has alot of vacuum when trying to take it off and also runs lumpy?

Iv unplugged the MAF sensor and seems to run ok and gave it a test drive and drive ok?
Gave that a clean with air flow cleaner but still no change, managed to plug it into my mates snap on code reader today and for the following codes:

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2F%5B%2F%5BURL%3Dhttp%3A%2F%2Fs1253.photobucket.com%2Fuser%2Fwesty6%2Fmedia%2FMobile%2520Uploads%2F06294161-4381-41B8-8CDD-92640F8D8B80_zpspk4mmqbp.jpeg.html%5D%5BIMG%5Dhttps%3A%2F%2Fi1253.photobucket.com%2Falbums%2Fhh600%2Fwesty6%2FMobile%2520Uploads%2F06294161-4381-41B8-8CDD-92640F8D8B80_zpspk4mmqbp.jpeg&hash=4f55f9c69c35bd997f4ff92eb20c81bd83f46b25)[/URL]

trying to just narrow down what i need for certain to order parts?

Title: Re: Rough idle ??
Post by: titchy on January 20, 2020, 01:04:49 pm

pcv very common

Title: Re: Rough idle ??
Post by: w357yuk on January 20, 2020, 03:03:36 pm

Ok will go for that see if it fixes the problem thanks

Title: Re: Rough idle ??
Post by: Dannyboi#722 on January 22, 2020, 10:09:38 pm

You’ve got an air leak somewhere down stream of the maf sensor. Pulling the dip stick car run lumpy mean your pcv is working perfectly.