vac lines are EVERYWHERE! no really. all over the place.

pull your engine covers and start looking around. if it is a very small diameter rubber hose, it is most likely a vac line. if your car still has the OEM vac lines, I believe they will be cloth braided. 3.5mm diameter. should be pretty evident if yours are old. They will look...well...really bad

good luck

 

Damn, you're right, there are lines everywhere. I'm afraid i'll screw this up. think if i take it to a shop they'll gouge me?? I dont wanna unplug something and have fluid spraying everywhere and messing my car up even more.

 

shouldn't be too bad at a shop but why pay for something you can do yourself? there are some good pics around that show where vac lines have been replaced with blue or red silicone lines. it will make it easy for you to find them. i looked a little bit but haven't been able to find the thread. hopefully one of those other guys will remember where it is (or may be the guy that did it)

sit tight

 

https://www.audiforums.com/forum/diy...ck-diy-171173/

4th pic down is a good start. the cloth looking things

 

lol all this talk about coilpacks and 2.0 got me confused. The 12v has one big coil pack. I'll shut up now.

 

if it is the coil pack is that a good thing that its all one? wonder if its cheaper. Thanx for the pics fellas. If i unplug one of these vacuum lines, does anything come out? or is it just used for air?

 

Just air
And refer to that big thing thats all alone as an ICM - ignition control module

 

It's just air. When your engine is running and the throttle body is closed, it creates a vacuum in the intake manifold. This vacuum is stored and used for other ****, like your brake booster. I would suggest you replace as many of those as you can find. Do them one at a time, pulling one off, cutting a replacement for it, and replacing it before you pull the next one off.

Pick up some 3-4mm silicone tubing online, you can get 15ft of it for like $20. That's more than enough to do one car. That way you'll never have to replace them again.

 

It's a 30v. There are three coilpacks, each driving two cylinders. They can't really be swapped around. Agreed that the misfire isn't read by the codes. Misfire codes are P0300 (random misfire), P0301 (cylinder 1 misfire), P0302 (cylinder 2), and so on. Not many vac lines on a 2.8 - pretty much every one of them is attached at least at one end to the solenoids on top of the rear of the engine. Run Seafoam through the gas and put in new NGK BKR7EUP plugs gapped at .032" and see what happens. Misfires are relatively rare in the 2.8 and they're a lot less susceptible to vac line issues other than age-related dry-rot, unlike the 1.8T.

 

I've been waitin for you to pipe up lol