Hello, it's me again. I have a few questions. :)

First of all, my 95 850 turbo wagon is acting up a bit. My check engine light is on, and has been on for quite some time. I pulled the codes, and I got 2-3-2 and 2-4-1. When I reset the codes, the car idles rough for a while until the IACV (i think the IACV does it) compensates and the engine smooths out. Then the check engine light comes on again. Does anybody have a clue as to what the culprit would be, before I take it into the dealership? I'm thinking it's vacuum related, as most, if not all, of my vacuum hoses are brittle and/or dry rotting. There is one hose in particular behind the engine attached to the turbo that is so rotted (yet not brittle, it's soft) that it is actually collapsing in on itself. This hose is about pinkie-finger in size with a right-angle bend at the attachment point, and it is coming off a larger hose that is coming off the main big hose into the turbo. Any ideas?

My next concern is a resonating vibration from about 60 mph on up. This vibration comes and goes consistently about every 3 or 4 seconds and seems to be in the back of the car, not the front wheels. I have brand new brake rotors and pads, and brand new tires. I had the tires re-balanced, thinking that might be the problem. It wasn't. Could this be a warped wheel? The vibration is not really harsh, but does increase in harshness with an increase in speed (i.e., at 80 mph, it's vibrating much harsher).

My next concern is the turbo. Most of the time it works flawlessly. However, there are times when I will push the pedal down, and the needle will only go slightly past center, and I don't hear that "hiss" that I love so much, and don't seem to get any boost. Could this be related to that collapsed hose, or could it be something else? (I'm thinking it's vacuum related, too, since it does work most of the time)

Thank you for any help!

Kevin