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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

What is this, and should it be plugged in?

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Old Aug 12, 2009 | 12:52 PM
  #1  
Erik Beeman's Avatar
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From: Concord, CA
What is this, and should it be plugged in?

I did a motor rebuild, and I don't know what this is, and I can't remember if this plug is supposed to be hooked up to anything....

Thanks guys

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Old Aug 12, 2009 | 12:58 PM
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is it putting on a check engine light
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Old Aug 12, 2009 | 12:59 PM
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3VZE? I'm thinking oil pressure sensor.
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Old Aug 12, 2009 | 12:59 PM
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oil pressure sender? or knock sensor? I'm guessing its a 22re....
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Old Aug 12, 2009 | 01:00 PM
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i think it is the knock sensor
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Old Aug 12, 2009 | 01:02 PM
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It's a 92 22RE, and no, no lights come on.

I do have a engine sputter and it KNOW it's something to do with the ECU cause it happens only under certain circumstances. I think this sensor might have something to do with it.

I have Chiltons sitting in front of me, but these F'n things are useless.
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Old Aug 12, 2009 | 01:05 PM
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Yep its the knock sensor on a 22re and it needs to be plugged in.
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Old Aug 12, 2009 | 01:09 PM
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What's the effect of it? No lights came on and it's had almost 400 miles put on it. Maybe this will fix my problem.
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Old Aug 12, 2009 | 01:14 PM
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it retards the timing when it senses engine knock or octane ping...etc. It wont throw a code or cause any problems till 1700rpm, and should b plugged in if you dont wanna burn lots of gas, and have even less power.
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Old Aug 12, 2009 | 01:17 PM
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Originally Posted by Team420
it retards the timing when it senses engine knock or octane ping...etc. It wont throw a code or cause any problems till 1700rpm, and should b plugged in if you dont wanna burn lots of gas, and have even less power.
Dude, this could totally save me. Sputter is around 1800, under easy throttle movement. Seemed low on power too for being fresh rebuilt. I am putting the truck on the lift as we speak, hopefully I can figure this out.
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Old Aug 12, 2009 | 01:34 PM
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So in the factory Toyota manual it says Knock sensor is 4WD only, so I guess I don't use this sensor.
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Old Aug 12, 2009 | 01:39 PM
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Yea ya do I just plugged mine in a few min's ago you should have a single pin wire that comes down the side of the wiring harness it should be gray that's the plug that go's in there.

Last edited by olharleyman; Aug 12, 2009 at 01:40 PM.
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Old Aug 12, 2009 | 02:10 PM
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Yeah you should plug it in. It will mess with your fuel mixture and make your truck run like crap. Mine was faulty and one day it wouldn't start. Don't want that happening to you now do you?
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Old Aug 12, 2009 | 02:15 PM
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I have a two wheel drive....Toyota says it's only used on 4 wheel drive....
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Old Aug 12, 2009 | 02:17 PM
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I can't find a plug.
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Old Aug 12, 2009 | 02:31 PM
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I think if Toyota put the sensor on the motor, there's going to be a wire there, or at least there use to be one, lol

have you priced a new knock sensor? yeah, that's be stupid to put something priced like that on there if it's not going to be used, lol


everyone's right, 22re, knock sensor; really need to peel your wiring harness apart and find that wire and plug it in


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Old Aug 12, 2009 | 02:40 PM
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Yes, you're right. It was on the block when I bought the truck. I don't remember if I un-plugged somthing there, or not. Lol.


Oh, wait........I have another 2WD 22RE in my driveway, I could just check that. DOH..!
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Old Aug 12, 2009 | 04:25 PM
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Ok. So my 88 has this sensor, and it has a plug. But, I CAN NOT find anything on this 92. There are no wires or any plugs that are even near it.

I jjust searched for an hour
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Old Aug 12, 2009 | 05:23 PM
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on my truck the wire on that sensor is just dangling. i was told that it was for the oil pressure guage.... i don't have a op guage in my cluster so i never bothered messing with it.... but now that you guys are saying it's a knock sensor i need to know where the other end goes

does anyone have a picture? or detailed info on where the wire goes from that sensor?

i've had a random sputtering/bucking problem for awhile now
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Old Aug 12, 2009 | 05:33 PM
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I do believe one o them thar dealeos is the oil pressure sender, an ta other one be water temptre
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