Yet another EVAP thread =)

[AudiCoupe]

Okey so I'm getting the following two DTC:s
P0299
P2187

After doing some research I'm leaning towards a evap problem due to the P2187 code but could P0299 also be caused by a evap problem or is that another story?

I'll try to sort these problems ow over the weekend.

[AudiCoupe]

Okey so I'm getting the following two DTC:s
P0299
P2187

After doing some research I'm leaning towards a evap problem due to the P2187 code but could P0299 also be caused by a evap problem or is that another story?

I'll try to sort these problems ow over the weekend.

Okey so I removed the oil filler cap while ideling and I felt a quite strong pull on the lid and heard a significant swoosh sound when air was sucked into the valvecase.
I read somewhere that this was a sign of broken N80 is this correct?

Please excplain the evap system to me shortly! Is it correctly understood that there should not be a vacuum in the valvecase while ideling?

And the car is a 2005 b7 2.0tfsi quattro avant!

[AudiCoupe]

Okey so I removed the oil filler cap while ideling and I felt a quite strong pull on the lid and heard a significant swoosh sound when air was sucked into the valvecase.
I read somewhere that this was a sign of broken N80 is this correct?

Please excplain the evap system to me shortly! Is it correctly understood that there should not be a vacuum in the valvecase while ideling?

And the car is a 2005 b7 2.0tfsi quattro avant!

No one who want to help a finn out? =)



I removed the pcv today and tryd sucking and blowing (haha very funny) in the direction of the arrow. Sometimes the valve seems to get stuck after sucking and I was able to blow aswell. That means the valve is broken or going bad I guess.
The valve was rev. "C" so I guess it's time to change it anyway!

Comments? Not on the sucking and blowing part =)

[Geoffafa]

I never knew about the Vacuum at idle, but if that was the case and your PCV valve was broken, then good find! I've had an evap code forever but that is because of a crushed line on the firewall.. (dont ask how i did that)

[flyguy327]

Some vacuum is normal at idle but it shouldn't be excessive. I would change the pcv valve and youre N80 valve. Its cheap so why not... Just start there. Throw in a new gas cap if you have the spare change. Ill refrain from any sucking or blowing jokes

[AudiCoupe]

Some vacuum is normal at idle but it shouldn't be excessive. I would change the pcv valve and youre N80 valve. Its cheap so why not... Just start there. Throw in a new gas cap if you have the spare change. Ill refrain from any sucking or blowing jokes

Thank you for the advice. But why should I change my gas cap?

I'll order the new PCV and N80 tomorrow and hopefully get rid of my codes.

[AudiCoupe]

Ok so I changed my PCV valve and the N80 valve yesterday and sure enough both of them were broken.

I could easily blow trough the N80 which you should not be able to.

The PCV consists of atleast 2 one way valves wich both leaked and did not always shut when I blew trough them.


Pic.1

Pic.2

If you want to check your PCV try sucking and blowing in the directons of the arrows in the pictures. If it's working like it should air should only be let trough one way. You should not be able to both suck and blow in the same hole.


The result of changing these is a much smoother idle and startup and also a noticeable increase in power becuase the boost is no longer going into the valvecase.

[B7 Projectile]

Helpful ..

[Sprinty]

I had the exact same problem, changed mine this weekend and had my coilpack recall done. Overall engine in much smoother for me as well. I had my gas cap replaced by the dealer under warranty a while back. They also changed the pcv. This time, I know the n 80 was bad and figured I'd change the pcv again to be sure I was clear. Cost me like 50 bucks in parts, well worth no CEL and smoother ride

[WalkerT]

When I remove my oil cap while the car is running it amost dies..... I am still under warrenty would this be covered?

[AudiCoupe]

When I remove my oil cap while the car is running it amost dies..... I am still under warrenty would this be covered?

I actually don't know if you can tell if the PCV is broken by removing the oil cap while ideling.
Before the change I removed the cap the engine shutterd and I felt a noticeable vacuum.
After changing the PCV still using the broken N80 there was a much stronger vacuum.
After also changing the N80 the vacuum was about the same as when I started using broken PCV and N80.

So my conclusion would be that if your N80 is broken but not the PCV you get a really strong pull on the cap.

[Tusin]

I have always been told that if you have a real hard time removing the oil cap then the PCV is borked. It would be awesome to get a general consensus on this though. Because I can remove my oil cap no problem, but the engine does start to stutter pretty bad.

[AudiCoupe]

Damn I got the faultcode P0299 again so it seems like I've still got a boost leak somewhere...