alex8181

iTrader: (1)

Hey guys, I am almost complete with the swap save for these vacuum hoses. I have two that come from the intake manifold, one on the front (pic 1) and one on the rear (pic 2). I also have one coming from underneath the middle of the intake manifold (pic 2).

I also have a sensor coming off of the main engine harness that says "sensor assy turbo pressure" (pic 3). I assume one of the hoses go to this sensor, while the other two go what I believe the repair manual refers to as the VSV Heater Valve (pic 4). Can someone give me some clarification what goes where? Thanks in advance

jadia4

I too am missing a connection, I believe its in pic 2. It causes a high pitch to low pitch whistling sound on the driver's side when I let off the gas.

OneJay

iTrader: (14)

I'm out of town right now, otherwise I would go out and check for you. But I know that in pic 2, the short hose coming off the second to last nozzle, with the little nipple on it, goes to the heater valve.

audi2nr

iTrader: (1)

pic 3 is your map sensor it needs to be hooked up to manifold vacuum so any source after the throttle body will work the other 2 i can't say for sure, i have not looked under the hood in quite sometime.

alex8181

iTrader: (1)

There are 2 vacuum hoses after the throttle body on the intake manifold. There is one that comes from underneath the intake manifold. Not sure which one would go to the sensor.

audi2nr

iTrader: (1)

any vacuum hose after the throttle body will work for the map sensor, its a good idea that it gets its own dedicated vacuum line to avoid any issues. ie no other things are connected to the hose just a hose from the manifold to the sensor

alex8181

iTrader: (1)

Took another picture of all three hoses. I traced the blue hose that goes underneath the intake manifold and I think it goes to the fuel rail but don't quote me on it.

alex8181

iTrader: (1)

Ok, so I found out that the RED tube goes to the power steering hose, looks like it just broke off.

The BLUE hose appears to go to a charcoal canister, unfortunately it doesn't appear like I have one on my 97 SC400.

Still don't know what to do with the green hose.