Hi. Having a bit of trouble with my tfsi vrs ar the moment. Lumpy idle and the revs climbing and dropping. 

The car has always been remapped 

and was fine up until I changed the air filter from a pipercross panel to a standard one and did an oil top up. 

 

I had slightly overfilled with oil as I have trouble getting a good reading from the dipstick. So I dropped half a litre from the sump plug. The oil is definitely within range now. 

 

At first it was giving me no fault codes. So I disconnected the maf and the idle evened out. I've had to drive it for a couple of days until I could get a new maf sensor. I scanned it again before fitting the new maf and it was showing p2279 air intake fault code. Fitted the new maf and cleared codes. P2279 is still there and the engine was still running like crap. 

 

I've had a search and there's a lot pointing to the pcv. At idle I can hear this valve hissing quite a lot. I don't know whether it should? I've given that and the breather pipes a clean out with carb cleaner. And I did notice that when I refitted, that the valve was rattling inside. When it wasn't before. So I guess it may have been gunked up. 

 

I also noticed from the search most people are having trouble with. Lower limit exceeded. But my fault says lower limit not reached. 

 

I've checked as much as I'm able to. The pipe to the throttle body looks good. The pcv breathers look fine. I can't see any other loose hoses or anything disconnected. 

 

Did I damage something overfilling with oil? Should I put the pipercross filter back in? 

 

If anyone knows anything I should look for I would appreciate any guidance. Thanks 

 

 

On 24/03/2019 at 09:42, Aaronmac89 said:

Hi. Having a bit of trouble with my tfsi vrs ar the moment. Lumpy idle and the revs climbing and dropping. 

The car has always been remapped 

and was fine up until I changed the air filter from a pipercross panel to a standard one and did an oil top up. 

 

I had slightly overfilled with oil as I have trouble getting a good reading from the dipstick. So I dropped half a litre from the sump plug. The oil is definitely within range now. 

 

At first it was giving me no fault codes. So I disconnected the maf and the idle evened out. I've had to drive it for a couple of days until I could get a new maf sensor. I scanned it again before fitting the new maf and it was showing p2279 air intake fault code. Fitted the new maf and cleared codes. P2279 is still there and the engine was still running like crap. 

 

I've had a search and there's a lot pointing to the pcv. At idle I can hear this valve hissing quite a lot. I don't know whether it should? I've given that and the breather pipes a clean out with carb cleaner. And I did notice that when I refitted, that the valve was rattling inside. When it wasn't before. So I guess it may have been gunked up. 

 

I also noticed from the search most people are having trouble with. Lower limit exceeded. But my fault says lower limit not reached. 

 

I've checked as much as I'm able to. The pipe to the throttle body looks good. The pcv breathers look fine. I can't see any other loose hoses or anything disconnected. 

 

Did I damage something overfilling with oil? Should I put the pipercross filter back in? 

 

If anyone knows anything I should look for I would appreciate any guidance. Thanks 

 

 

My 2015 VRS did this last week. Suddenly just went into limp mode. Having only put 5000miles on it from when purchased i thought it was odd. Anyways still under skoda warranty so its away back to get sorted. Hopefully will be as good as new when i get it back. 

Turned out to be the pcv valve. Overfilling with oil must have nackered it. Replaced and the car runs fine again