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PHOENIX · 12-18-2002, 01:23 PM

When searching for my oil leak I found a sensor or something on my engine.

It is located on the driver side and screws into the block. Its right in front of the oil filter. It has about 3-5 wires coming off of it and heading up towards the distr. I didnt follow them all the way, but they head that direction. They may be going into my wire harness. Anyone know what this may be?

Tom · 12-18-2002, 01:28 PM

knock sensor for the ESC distributor? Do you have a HEI?

PHOENIX · 12-18-2002, 01:54 PM

I replaced my original distr. with a Proform HEI. The Proform doesn't hook to the computer like the original.

Is that the normal location for a knock sensor? Because I thought I already removed or disconnected my knock sensor on the passenger side of the block.

Ohh well I guess I'll just track down the wires and see where they go. What ever it is will most likely be removed.

**swervin ervin** · 12-18-2002, 06:07 PM

On my 85, and I'm sure on the rest of the LE9 engines, the knock sensor is on the passenger side front of the block. On some engines they had oil pressure senders in front of the oil filter, but it sure wouldn't have 3-5 wires going to it. I'm not sure when they quit putting the oil pressure sender in front of the oil filter. Also, the knock sensor don't have 3-5 wires either.

PHOENIX · 12-18-2002, 06:17 PM

Damn what the hell is it then. Ill let you guys know what it is when I figure it out.

pkbinplano · 12-18-2002, 07:17 PM

un plug it and see what happens !

ElGracho · 12-18-2002, 08:28 PM

That is right above the oil filter. It is an oil pressure switch that stops voltage from going to your electric choke. It is why the choke light comes on when your engine dies. If you don't have oil pressure but continue to drive your truck, it will keep it from running well (choke will take forever to come off) and maybe make you look down at your gages to see that you have no oil pressure.

I found this out the hard way when I replaced an engine and didn't put that switch in. I couldn't figure out why my choke worked before, but not after the swap. I ended up jumpering the connector, it's worked that way for four years!

Hooter · 12-19-2002, 01:56 AM

My unlce had that same type of switch on his boat. Turns out this switch would cut the motor off when there was no oil pressure. Th 4.3 would never start took me 3 hours to track that thing down

J-Spec C10 · 12-19-2002, 02:31 AM

you should ask your mom.....
Just kiddin' ya!

Im not sure, I just wanted to keep you post at the top so you get a good answer. sorry I can't help. I don't have that sensor, I looked after I read the post.
L888's

12-18-2002, 01:23 PM	#1
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	What is this? When searching for my oil leak I found a sensor or something on my engine. It is located on the driver side and screws into the block. Its right in front of the oil filter. It has about 3-5 wires coming off of it and heading up towards the distr. I didnt follow them all the way, but they head that direction. They may be going into my wire harness. Anyone know what this may be? __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-18-2002, 01:28 PM	#2
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	knock sensor for the ESC distributor? Do you have a HEI? __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

12-18-2002, 01:54 PM	#3
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I replaced my original distr. with a Proform HEI. The Proform doesn't hook to the computer like the original. Is that the normal location for a knock sensor? Because I thought I already removed or disconnected my knock sensor on the passenger side of the block. Ohh well I guess I'll just track down the wires and see where they go. What ever it is will most likely be removed. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-18-2002, 06:07 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	On my 85, and I'm sure on the rest of the LE9 engines, the knock sensor is on the passenger side front of the block. On some engines they had oil pressure senders in front of the oil filter, but it sure wouldn't have 3-5 wires going to it. I'm not sure when they quit putting the oil pressure sender in front of the oil filter. Also, the knock sensor don't have 3-5 wires either. __________________ Mike 1985 Chevy C-10

12-18-2002, 06:17 PM	#5
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Damn what the hell is it then. Ill let you guys know what it is when I figure it out. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-18-2002, 07:17 PM	#6
pkbinplano pkbinplano Join Date: Nov 2002 Location: Plano Texas Posts: 370	un plug it and see what happens ! __________________ http://www.picturetrail.com/gallery/...7496&members=1 84 chevy silverado aka The Bananna Boat

12-18-2002, 08:28 PM	#7
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	That is right above the oil filter. It is an oil pressure switch that stops voltage from going to your electric choke. It is why the choke light comes on when your engine dies. If you don't have oil pressure but continue to drive your truck, it will keep it from running well (choke will take forever to come off) and maybe make you look down at your gages to see that you have no oil pressure. I found this out the hard way when I replaced an engine and didn't put that switch in. I couldn't figure out why my choke worked before, but not after the swap. I ended up jumpering the connector, it's worked that way for four years! __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

12-19-2002, 01:56 AM	#8
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	My unlce had that same type of switch on his boat. Turns out this switch would cut the motor off when there was no oil pressure. Th 4.3 would never start took me 3 hours to track that thing down __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-19-2002, 02:31 AM	#9
J-Spec C10 Whats this wire for?.... Join Date: Dec 2002 Location: Barrie, Ontario, CANADA Posts: 378	you should ask your mom..... Just kiddin' ya! Im not sure, I just wanted to keep you post at the top so you get a good answer. sorry I can't help. I don't have that sensor, I looked after I read the post. L888's __________________ Kyle CANADIAN CONNECTION '82 C10 Resto-Custom--> * 2 1/4" manifold back dual exhaust with Hooker Aerochambers & High Flow Cats Taylor Ignition Wires Centerline 15" Telstars with 32"x10" mudders



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