knock sensor questions

[yitzac1990]

I am putting a Ron Francis wiring harness on my 1985 turbo motor, and have a question about the knock sensor. based on what I found online, it should be located on the firewall side of the intake? should it be on the lower intake or upper? The only sensor I have on my intake doesnt have the correct connecter, and I think is some kind of secondary coolant temperature sensor (for the coolant that runs through the manifold) located way down on the lower intake. Did 1985 engines have a knock sensor? I will only be running 93 fuel, do I need to worry about having/plugging in the knock sensor? Right now I just have the connector hanging around in the area not plugged into anything. I can take pics of what my intake looks like later today.

[KevinK]

All the Efi turbos had a knock sensor. I'm pretty sure it changed locations from 84 to 86. Intake manifold sounds about right.

[80fairmont]

Bottom of intake closest to the fire wall. Most leave it unplugged.


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[yitzac1990]

so this is the back of my intake, on the bottom. that sensor there is (im 99% sure) some kind of coolant temp sensor, because when I took it out, i noticed it was in the coolant tract.



And this is the front/top of the intake. no other sensors screwed into it.

[JTurbo]

This may help: http://vb.foureyedpride.com/showthre...-lower-intakes

BTW - you either have an 85.5 SVO or the motor was swapped with the 85.5 or 86 style. The 84/85 uses the flat (as opposed to square) intake.

JT

[yitzac1990]

ahhh i see, so a previous owner plugged my knock sensor hole then. I see that now, above my questionable third coolant temp sensor. fair enough, I will probably leave it be since I will always run premium fuel, and stock wastegate pressure for now.