I do not knows where goes the hose

[Drzaius]

Hey guys want to thank you in advance for all your help you always seem to know whats up and have fixed me a few times. I have a 2002 Jetta 1.8t and I am getting the random misfire codes. P0300 P0301 ect. Read and seen what to do on that check the vacuum hoses and stuff.

What has been done so far

mass air flow
new plugs
recall on the coils
N71 valve
Throttle body cleaned
vacuum hoses checked and bad ones changed

The last one brings me to my problem. At the end of the EGR SOLENOID VALVE VACUUM CHANGE OVER (026 906 283 H) a hose goes into one end and looks like another one comes off the other but there was no hose there. Not sure if this is my problem but if someone can tell me where both ends goes that would be awesome.

Lastly is there anyway to check if my catalytic converter is bad?

[Drzaius]

after looking around it looks like just a cap goes on there. Could no cap on there cause it to misfire like it is?

[Geeked]

to check your cat, get under the car and tap *gently* on it with a rubber mallet. If you here marbles bouncing around in there, the cat. converter has gone bad.

[Jeff_Edison]

Can you make a few picture's of the hose..??

[Drzaius]

mine is missing the cap. Does that even matter?

[scirockalot8v]

put some tape on it and see if it helps. also did you so a throttle body adapt?

[userpike]

mine is missing the cap. Does that even matter?

Put a cap back on there and check for vacuum and boost leaks. That cap needs to be there. That solenoid valve controls the combi valve for the SAI system, not egr just so you know. The other solenoid (gray one in the middle of the pic A.K.A N249 valve) operates the diverter valve.

As far as your CAT being bad, check for DTCs using VCDS or an OBD scanner. Tapping on the CAT with a hammer can only prove its utterly destroyed. The CAT can still be bad and pass the "hammer test". The proper way to check for CAT failure is to run tests using VCDS or VCDS-Lite even.

After doing all this, you need to clear the codes out and see what comes back, Then adjust your fix game accordingly. Good Luck.