fbarnhill

Hi guys, I am almost finished with my TB/WP job on my 928. I was plugging the wiring harnesses back in and found one that I cant identify. It is the 3 pin connector that has the belt tensioner connector on the same harness. It crumbled when removing the dist cap from the right side of the engine. I cant find the wires it connects to. It seems it must be down there somewhere behind the AC and air pump but I cant find it. If you can identify this wire, please do so and let me know where to search for the other end of the connector. I am planning a trip for tomorrow and really want to drive this one. Its the gray wire in the picture below.

Thanks in advance for your help.

karl ruiter

Mates with something behind and below the cam sprocket. Cam timing sensor or something.

FredR

Hall trigger connector assuming your model year has one.

davek9

Yep its the Hall sensor input, the sensor is used on all S4's and up, located behind the right cam (1-4) T Belt gear housing
Without it your losing HP in the form of reduced spark advance.

Dave K

fbarnhill

Thanks guys. So does my connector connect directly to the sensor or is there a wire connector that I might be able to find. There is no room in there at all. Any suggestions would be appreciated. Also, can it be driven without it for a short while?

FredR

Dave,

OP has 86.5 model- does that utilise the Hall trigger concept? I know it does not have knock sensors.

worf928

As above, you've pulled-loose the Hall Sensor connection. You'll find that a good bit of the sender-side connector in there and on the ground.

If you run without it, you'll loose 6-degrees of spark advance. You won't be able to pull away from a weezy Honda running on 1.5 of its three cylinders.

At this point, it's the easiest it will be to get a new Hall Sensor in there unless you're doing a cam cover removal next. You'll need to unstring the timing belt, remove the cam sprocket and the three-legged 'spider' behind it. Then remove the plate behind the sprocket. The Hall Sensor is bolted to the back side of this plate.

worf928

Looks like an S4 engine. Right OP???

soontobered84

Frank,
There is a bracket that the part you are seeing slides into to hold it. The Hall sensor itself has a short pigtail of its own with the male plug on the end.

fbarnhill

Thanks guys. I guess this baby will sit another week or so while I drive the 86.5 to Mississippi. That means new tires for the back and giving her a good checkup.

FredR

Dave,

Title said it was 88S4 but avatar and. the "what I run" bit says he has an 86.5. It sure looks like an S4 to me and I cannot think of any other connector in that neck of the woods but then it looks as though the OP has spliced in a new connector looking at the insulation colour

fbarnhill

I'm sorry guys, I should have said this is my new 88s4. I have lusted after another since my old White one burned 9 years ago. Since I couldn't prove the TB/WP had been done, I felt it imperative to get it done immediately. Good darn thing I did too as the old water pump and seized. I can't believe it didn't make a horrible noise but I heard nothing....So, now I get to do the Hall sensor. I just put this new belt on yesterday, guess its coming back off...

worf928

Belt doesn't have to come totally off. Pull both side covers. Clamp the belt, lightly, to the left-side (port, d-side) sprocket so when it jumps you don't slip teeth. Loosen belt tension then slip the belt off the right sprocket.

worf928

Nope. Hall sensor branch of the LH/EZK harness is gray.

FredR

Interesting- presumably the OP just replaced the connector and nothing else. My connector and the Hall sensor have never left each other in the last 14 years despite a couple of timing belts and a new water pump and not even sure I could see a grey section even if I went looking for it given the way such routes! Will take a look out of interest tomorrow.

If the OP was doing a timing belt job I am left wondering why this connector was disturbed? I never disconnected my Hall sensor when doing my timing belt or when changing out the cam sprockets.