MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: 07dub on June 05, 2023, 09:56:36 am

Title: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: 07dub on June 05, 2023, 09:56:36 am

Any ideas ?

Had a worn out cam follower ,
so changed that and needed new cam shaft and hpfp.
It was also due a new timing chain and tensioner and also changed the pvc aswell.

But now have rough idle . Car is stock , any help would be appreciated

(https://i.postimg.cc/ZYvHGWX6/D7-F30-E49-ED7-A-47-A0-84-D3-953-FD6-ED8-EEF.jpg) (https://postimg.cc/Sjqc8xSK)

Title: Re: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: ROH ECHT on June 08, 2023, 04:34:58 pm

Scan for stored codes first and make note of them. While doing all of that work...a tube may have developed a split: one of the two corrugated PCV tubes or brake booster tubing. If you have VCDS or other capable device to monitor live data, you can view the live short term fuel trims (MB 033 block 1) to see if a leak is present. You must clear codes and go back tho the MB as shown here after 2m. He shows what a leak looks like...and you need not induce a leak. Just follow instructions shown at 3m20s. A leak will show in MB 033 block 1, as it does at 3m40s, the value will be more than ±10% before it begins to adjust;

Title: Re: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: ROH ECHT on June 08, 2023, 04:39:52 pm

If the trims show no sign of an un-metered air leak, then perhaps wiring or connectors for them was disturbed or damaged. A code would likely be stored if so.

Title: Re: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: 09Pirelli on June 09, 2023, 02:01:35 am

check the dip stick, if the o ring is missing this could be the cause

Title: Re: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: 07dub on June 10, 2023, 09:12:38 am

Thanks ROH ECHT and 09 Pirelli ,
cars in shop now getting scanned but will get the hoses and dipstick checked too 🤞

Title: Re: Rough idle after new cam shaft , timing chain, pvc valve , cam follower ?
Post by: 07dub on June 30, 2023, 01:20:36 pm

Quick update, apparently was a timing issue , should be all sorted now.
Had a split hose and ordered a new dipstick

🤞 all good for a bit now