shazam01

Now I've gone & done it. I've rebuilt my '87 924S motor and it's now ready to be reinstalled. But, I can't figure out where one electrical connection goes. My question is: Is the wiring harness (at least the one connecting motor components (e.g. Speed Sensors, Idle Speed Control, Injectors, Oil Pressure Gauge & Air Mix/Intake) the same for 944's as is for 924S'?
In that same sub wiring harness, there are two connectors with 2-pin female receptables w/ spring clips. One connects to the top of the block. What does the 2nd connect to?
If I knew 924Ss were similar to 944s, I could look at a 944 locally....as there are no 924S's in my area.

thirdgenbird

This plug?




I am not sure it goes anywhere on the 924s. My car runs fine as pictured.

John_AZ

Congratulations on the rebuild.
I think I may have the mystery 2 pole connection.
One would go on the DME temp sensor towards the front/top of the block.

The other connection may be for the rear/top intake. I have a 2 pin connector on my '88 that sits on the top/rear of the intake. First picture. To the right side just infront of the light. The tiny bit of yellow is the oil fill cap.

I do not have this connection on my '87. Second picture.

I looked on the PETs and cannot tell you what the connection on the '88 does other than monitor the intake pressure?????

GL
John

thirdgenbird

i should have noted that my car is an 87 and i can not find where that darn plug goes. the DME temp sensor is plugged in.

where do the wires lead on the 88. i do not believe i have this. is it possible this was incorporated in some of the 87 wiring harnesses but was not used until 88 on the 924s?

V2Rocket

is your idle control valve plugged in?

thirdgenbird

mine is. i can not comment for the OP.

i had a thread about this a while back but no one could answer it. the car runs fine so i quit looking. i find it more than a coincidence that another 1987 924s has the same empty plug.

time will tell.

John_AZ

ICV has 3 male.
John

jdgunn

if it helps, my '88 924S has a plug that goes nowhere.

thirdgenbird

i think that settles that it is not needed on these cars.

shazam01

Both the Idle Control Valve (comments by V2 Rocket) & the "...DME temp sensor toward the top/front of the block..." (suggested by John_AZ) are connected.
Thanks all........I'll go ahead and mount the engine & see if everything goes well. I'm so eager to get it going!
Shazam01

whalebird

My 87 (built 4/86) does not have this plug.

jdgunn

I don't know, it would be nice to know why it is there. I have a nagging suspicion it is supposed to be connected because I don't remember having a loose plug when I removed the engine... but, it was the only wire I didn't label, so It could have been lost in the muck.

Yarf

It could be for the turbo charger electric cooling pump. If it is then forget it unless you have a Turbo.

shazam01

There's no Turbo. I've attached a sketch of what my wiring system looks like.
shazam

whalebird

Anybody have the wire colors? I'll see if I can find it in the factory wiring diagrams.