whats missing in this picture

j930 · j930's Garage

I started my first oil change and noticed that there appears to be a piece missing that would maybe return to the engine compartment but I see no where in there to terminate. THis is on the passenger side and is towards the rear right next to the hard oil line that turns into the flexible line. its the silver tube that ends and you can see the hole that goes up into the engine compartment. thanks line.

911nut · 911nut's Garage

You are missing the fresh air supply hose that runs from the engine fan to the heat exchanger.

RarlyL8 · RarlyL8's Garage

That needs to be fixed now.
There are 3 problems, you are blowing cooling air into the engine compartment, sucking hot air from under the engine, and pulling potentially harmful vapors into your cockpit.

j930 · j930's Garage

if you guys could throw a picture up, of where this thing is to terminate. I went to the Porsche dealership and they could not even show me on the PET diagram. thanks

A930Rocket · 10-12-2010, 08:19 AM

It's just a paper covered flexible hose that connects the silver pipe, goes through the hole in the engine tin and down to your heat exchanger.

Does the other side have a hose or is it missing as well? Might as well check and see if you have hoses connected the heat exchangers to the flapper valves as well.

Here's a pix of mine.

j930 · j930's Garage

very nice of you to pull the engine out for me... Now I can see what you are talking about. my car has A/C so the connection for that black tube is directly under where the compressor sits. Maybe its the condenser.. doesn't matter. thanks for the info and I ordered the part. NIce clean engine.

A930Rocket · 10-12-2010, 04:57 PM

Your best bet is to push the tubing in from the bottom and connect it to the engine duct work. Once you get it in, you may need to push and pull the tubing, but be carefull not to tear it Removing the AC compressor will make it much easier.

j930 · j930's Garage

thanks for the advice. where are those flapper valves you referred to.

A930Rocket · 10-13-2010, 12:06 AM

Under the car, just inside the rear frame rails/rear wheels. They are black, round and have a rotating cover that opens and closes the flappers.

j930 · j930's Garage

I looked and I don't see them, do you have a picture or diagram and what connects into them. I know when I turn on the heat I get air coming out. up in the front behind the sides in the footwells I remember seeing some small pump looking things that have the thicker lines running in and out of them.

j930 · j930's Garage

I find another wire that is disconnected, see the picture below. THe red wire is not connected and appears to have been that way for some time. This is directly behind the boot that connects the intercooler to the turbo. THe yellow wire connects to a terminal that is on the right as looking down on it and the red one goes to the post that is on the left, any thoughts on what it does?

jwasbury · 10-13-2010, 08:52 AM

If you trace that yellow wire, I think you will find its connected to a tempurature sensor that screws into your chain-box cover. That temp sensor is part of the cold-start system, and is used to control whether the cold-start injector adds additional fuel on startup (or not). The sensor has two terminals, and I think your red wire should also be connected to it.

Quote:

Originally Posted by j930

I find another wire that is disconnected, see the picture below. THe red wire is not connected and appears to have been that way for some time. This is directly behind the boot that connects the intercooler to the turbo. THe yellow wire connects to a terminal that is on the right as looking down on it and the red one goes to the post that is on the left, any thoughts on what it does?

A930Rocket · 10-13-2010, 09:36 AM

The thermoswitch is behind the pipe from the turbo to the intercooler. Here's a pix of where it's located. Not my engine, but it looks nice.

brasch · brasch's Garage

I have found that mine is unhooked, have not started yet, but wondered what it would be?

And which terminal gets which color? Does it matter?

Alan L · Alan L's Garage

I don't think it matters. The Y wire feeds power to the thermo sw from the starter solenoid on cranking. The sw is just a contact point that allows the circuit to continue to the CSV. The CSV is disabled when the oil temp in the chain case says the engine is warm, (sw open)and when the cranking stops. In a warm climate the car probably will start quite well with the system disconnected. It just fires a brief squirt of fuel down the inlet throat on cold crank.
Alan

T77911S · 07-25-2016, 03:24 AM

yes it does matter.

the power from a contact in the starter feeds the CSV and the TTS from one wire. this wire heats up the TTS.
the other wire from the CSV goes to the switched portion of the TTS. this is a direct ground when the TTS is cold/closed.
the TTS is heated by power because it would take too long for engine heat to open the switch.

the 2 connections on the TTS are different sizes. they are a MAJOR pain in the hinney to get on with the down pipe from the AFM to the turbo on. if you can get them on without removing this pipe you have some serious skills. (napoleon dynamite).

getting that air hose on without removing the AC bracket takes some skill too.
you did not show the top side of your engine but do it have the air tube that is under that bracket.

what I do with my compressor when I remove it is to lift it out of the engine bay, with hoses connected, then place a very thick and soft padding on the rear fender and set the compressor on the top of the rear fender.

the flapper boxes are way up high right behind the engine. one is up by the starter. you will see a small box that may show 3 holes with a round cover that rotates to open or close the holes.
there should be an air hose from the heater box to the flapper then from the flapper to the car body.
the flapper is either open to let the air going thru the heater box escape under the car or divert it inside the car when you want heat.

brasch · brasch's Garage

I don't have air, so I may be able to get it back on since my intercooler is off anyway, would this make the car not run right?

Alan L · Alan L's Garage

If you got the IC off, then you can get at it. Located by where the up-pipe sits on the turbo - screwed into the chain case. The terminals may be marked - now that I look at my wiring diag - thanks to T77911S. If they are marked, the Y wire goes to 'G' and the r/blk wire goes to 'W'.
The only symptom with it not working is poor cold start. If it is starting OK from cold, you will not notice any difference. If it has not been working for a while it may have seized the CSV also. You can check while you have things apart. Put 12v on to the Y terminal, and earth the r/blk terminal. You should hear the CSV click on/off as you switch the power on/off. It is located on the rear of the intake throat - on the back of the intake manifold.
Alan

brasch · brasch's Garage

Thanks Alan I will try that to test if it is functioning