Speed and reference sensor gap adjustment

[Efren]

Hey Gang.
It’s been awhile since I posted.

I broke down couple weeks ago and of all places near Crazy Ed’s neighborhood. Had the car towed home and after some troubleshooting I found my Reference Sensor cables all cracked and fell apart as I touched them. I’ll need to replace these first before I can move on.

Is there any videos or step by step tutorials on this topic? After all
These years of ownership this will be my first time tackling it.

Much obliged

[Efren]

BTW while I was waiting for a tow truck on Los Altos Expressway a gentleman saw me on the side of the road. He took the time to drive home and bring out his awesome 91 944 S2 cab and came to offer help. His car was in excellent shape of which he’s owned since new. I forgot his name as I’m horrible with remembering names. Must be my old age.

I wanted to thank him for stopping by.

[Tom]

Hey Gang.
It’s been awhile since I posted.

I broke down couple weeks ago and of all places near Crazy Ed’s neighborhood. Had the car towed home and after some troubleshooting I found my Reference Sensor cables all cracked and fell apart as I touched them. I’ll need to replace these first before I can move on.

Is there any videos or step by step tutorials on this topic? After all
These years of ownership this will be my first time tackling it.

Much obliged

Sorry to hear that happened. They're not cheap, and it takes some effort to install, but you can't go wrong with a new Kroon harness. See my install thread here. When I replaced mine, I was horrified to see how many places where the old factory harness was frayed or on its last legs....

If you would rather just do a patch harness, here are Lindsey's instructions.


Or if you want to try your hand at replacing just the connectors on the end of the factory wires, you can get part numbers and info on the connectors here.

[Efren]

Thank you very much Tom. These will be helpful.
Thankfully the Harness end of the Reference sensor Connector is in good shape. I purchased two new sensors.
What I’m worried about is if I remove the old ones will I need to gap the new ones when I install them.
Or
Will the gap remain intact if I don’t loosen the adjustment bolts

[Tom]

Thank you very much Tom. These will be helpful.
Thankfully the Harness end of the Reference sensor Connector is in good shape. I purchased two new sensors.
What I’m worried about is if I remove the old ones will I need to gap the new ones when I install them.
Or
Will the gap remain intact if I don’t loosen the adjustment bolts

If the sensors are new, don't touch them! Just disconnect the connectors and do all your work on the engine harness. No need to remove the sensors or loosen the mount or otherwise mess with the sensors/gap...

[Efren]

Sorry for confusing you Tom.

I purchased new sensors. The harness connectors on them fell apart. The plastic ends just crumbled. I need to replace them.

[Tom]

Ah, got it. You might want to check the harness side too just to be safe. Seems to me if you just pull the sensors out of the holder without moving the holder, the new ones should be gapped close enough -- assuming they are both the same brand, size, shape, etc. (which they 'should' be). If you never saw my video on the sensors, and how the gap affects the signal, it is below if helpful. Although you definitely want to shoot for the factory spec, as you can see in the video, in reality you have a lot of room to play with...

[944m3]

@chris white posted a good method a few months ago, can’t find the post. But basically use blue painters tape on the end of the reference sensor. Maybe 2-4 layers to get the right gap measurement. Then install the sensors just down to you feel contact. Torque down and you’re done. The tape will wear off where touching. The remaining tape will not interfere with signal.

[Efren]

@chris white posted a good method a few months ago, can’t find the post. But basically use blue painters tape on the end of the reference sensor. Maybe 2-4 layers to get the right gap measurement. Then install the sensors just down to you feel contact. Torque down and you’re done. The tape will wear off where touching. The remaining tape will not interfere with signal.

Thanks.
I found that post and read it. He used 4 pieces of tape which amounts to about .4

[Efren]

Ah, got it. You might want to check the harness side too just to be safe. Seems to me if you just pull the sensors out of the holder without moving the holder, the new ones should be gapped close enough -- assuming they are both the same brand, size, shape, etc. (which they 'should' be). If you never saw my video on the sensors, and how the gap affects the signal, it is below if helpful. Although you definitely want to shoot for the factory spec, as you can see in the video, in reality you have a lot of room to play with...

Thank you Tom.

I just knew you had all these documentation somewhere.

I got it installed. I’m hoping I didn’t disturb the gap since I only pulled the sensors straight out with no issue.

Tried to start it but my battery is dead. I have it on a charger now so I’ll wait about an hour or two.