jonvo

I picked up this motor for my 944. Can anyone here identify what goes where?

968turbos2

1. is the heater control valve 944 has pretty much the same connected to vacuumn lines on firewall that are controlled by Climate control
2. goes to the tank venting valve.

3. Idle Speed Motor right next to this one a 3-4 mm goes to your vacuumn resevoir/system

4. Fuel Pressure Regulator

5. goes to vacuumn resevoir/vacuumn system

6. Brake Booster

jonvo

Thanks 968turbos2. Am I getting this right?

1. This will go somewhere to the firewall for climate control.

2. Where is the venting valve on a 944? or 968?

3. This will go to the intake arm.

4. It looks like the FPR is already connected to a spot behind the intake manifold. Maybe it's in the wrong spot?

5. Where is the vacuum reservoir/vacuum system?

968turbos2

1. Yes it will via a collection of plastic tube and hose to reach but essentially this is connected to one of the vacuumn hoses on the firewall around the center next to some ac lines or coolant lines if memory serves. This would not be connected directly to any engine vacuumn (except via the heater control)

2. looking downon your fusebox, on the engine compartment side (to the left) you will see a meta looking valve with a vacuumn hose on it and a 1/8 size host as well. (I think a testing connector is part of the same bracket) Problem is....a 968 uses a tank venting valve (electric 2 pin connector if you have 968 wiring harness) connects to it.

3. (Big one) will go to the intake for the idle speed motor the feed being the intake bellows on the throttle. On the 44 this was under the intake in the middle. On the 68 it is connected to a cast threading under the throttle flange on the intake manifold.

4 should be the small tube under the throttle that it gets vacuumn from I believe.

5 Standing on the passenger side looking at the battery it is right above it Round black coffee cup sized thing with only one vacuumn hose coming off of it going throgh the firewall to engine compartment.

I am sure someone has a pet diagram of the vacuumn system on the board. If no one posts it before I find mine I will post a vacuumn diagram.

odurandina

very nice.

968turbos2

Thinking some more on it it just hit me that ...the tank venting valve on a 44 is actually a thermal two prong valve on the head (in back) usually gets broken and causes vacuumn leaks that are hard to find. 68 uses an electrically activated valve.

ernie9468

Sending you some engine bay pics of 944 to 968 conversion,hope it does help in any ways.Can't remember if I pick those up here on Rennlist or Pelican.

968turbos2

That heater control valve aint stock, never saw a metal one but that don't mean it exists but figured you may want to know. Easy part to get on ebay if you go back to stock (same as 44)

Need to find that diagram...You are putting this in a 44 using the ECU from the 68 correct?

jonvo

Yes, I have the 968 ecu and I have started doing some of the wire changes (following Todd's chart)

I was looking under the hood of my 944 and i saw that the heater control valve is connected to the other heater hose (behind the motor near the firewall). Can i just keep that one and remove the metal one on the 968 motor? I will just replace it with a longer coolant hose.

The two prong venting valve for the 968, is this the connector near the 14 pin connector by the brake booster? I noticed it while looking at the 968 engine harness yesterday and was wondering what that was for.

While we're at it, does anyone know if the 968 throttle cable is different than the 944 one?

968turbos2

I think the answer is yes on the heater control valve.

Yes on the metal valve but that is connected to a vacuumn temp switch for the 44, on the 968 this is connected to a tank venting valve that replaces the thermo switch that serves the save purpose and is controlled by ECU and not temperature like he 44.

I think they have different part numbers but I think you can try to see if the 44 cable is long enough. Same cable but may be longer on 968.

Also correction on vacuumn hoses,
The small hose near #3 goes to the fuel dampner on the fron of the fuel rail and the one under the throttle (which sucks air before the throttle) goes to the fuel pressure regulator

968turbos2

Here is a diagram of the small hoses on the intake manifold

jonvo

is that a diagram for a 944 or 968?

968turbos2

968

dillon410021

it's off a 1995 968
http://www.porsche.com/all/media/pdf...SA_KATALOG.pdf

type in intake manifold and scroll down a bit

jonvo

Thanks guys. Hopefully all of this makes more sense once the old motor is out.