Rough idle (again)

[pudding]

Keep it standard mate.  It's the cheapest and best solution     PCV deletes cause more problems than they fix.   VW's engineers kind of knew what they were doing when they designed this engine 

[Pesky jones]

VW's engineers kind of knew what they were doing when they designed this engine 

Making money? 

[pudding]

Yeah, I imagine a primary oil separator, a partitioned cam cover and a front PCV system was proper cheap to make.   Running a cheap bit of rubber pipe down to the floor and getting massive fines from Brussels is a far better way to make money 

[Pesky jones]

Haha no, you're right the OEM PCV system is obviously the way to go. I was more alluding to the rationale that just because a VW engineer designed it, it doesn't mean it was the best possible option for the engine. Let’s not be under any illusions, VW, like any other car manufacturer is in it to make money, not good engines, money. Twas just a joke 

[pudding]

Lol, I notice you've snuck a smiley in there now    It wasn't so easy to tell it was a joke before!

Well obviously VW don't make cars for the good of their health, but I think you'd be surprised by how little they make on each car.  Regardless of costs and rationale, the EA113's PCV system is the best I've seen on a 4 cylinder turbo car to date for a road car.

[Graham1990]

I've got a strong feeling its air leak related. Which your upcoming smoke test will highlight :)

Also, you might have a number of leaks, so dont stop the smoke at the first leak. For example, if introduced at the inlet you might have some smoke egress from the MAF housing which wouldn't be significant enough to cause your issue. If you let the smoke continue round, you might find a much more significant leak at say the turbo outlet pipe or a bayonett coupling at the intercooler etc.

I’ve replaced the pcv and the two hoses that had the vacuum leak. Still a rough idle!! 🤔🤔 all that’s left to do is repair/refurb the injectors and clean the intake valves. So that will be next on the to do list. Bloody car! 😖😖

[pudding]

Injectors is fairly standard.  They all need new ones, or refurbed at least, at some point!  Direct injection causes more issues than it solves!