Originally Posted by smashbar
Ok, so with the help of a couple local 3Si members, I was able to do a leak test of my TT's system. We found that everything was sound, except for some obvious air coming out of where the fuel injectors connect to the lower plenum (the front 3 at least). Are there just some o-rings that need to be changed there? Do I need to remove the upper intake plenum to get them out? Can I just get these O-rings at an autoparts store?
Also, what would be the symptoms of this type of leaky injector condition?
You need (6) MD087060 Injector Insulators. If the front three are leaking chances are the rears are also. You will need to pull the plenum and fuel rail. You should be able to get away with pulling the rail intact so you wont have to deal with fuel. I couldn't find these for a fair price locally so I just ordered them from a mitsu dealer. (mitsupartsdirect.com)
Symptoms? The car will idle badly if at all. When I rebuilt my engine I forgot to get new ones and when I put it back together I couldn't get the car to idle they leaked so bad.
oh also make sure you have the "sheet" (rubber spacer) on the other side of the injector(fuel rail side), if any of these are missing the injector won't push down on the insulator hard enough.