Unknown engine plug

[Isaurio]

Hello TGC. I need help identifying a plug. I need to know where it goes.
When i did my Outlander intake mani there was one plug that was left out. This wire goes inside the engine block is above the oil pressure switch here some pics, any comment are welcome. Plug is a male and it have one red and one black wire. This is from a 02 I4

[99galantES]

would it be from the knock sensor? i have one in and it looks like that just sitting in the bay

[Isaurio]

dont know good question. But it needs to be plug somewhere. Dont find the female plug.

[99galantES]

same with me i have a new engine but that plug is just laying there cuz it doesnt have a connector to it my old motor never had it

[Isaurio]

Dam it needs to go somewhere because is coming out from the engine.

[99galantES]

did you ever notice it before

[Isaurio]

not really no. Dont know if it did go somewhere on the old intake mani. I want to know so bad now.

[99galantES]

lol does your car drive fine without it?

[Isaurio]

Well is a little rough idle on drive and reverse.

[mrg7243]

i dont recall seeing that plug hold on let be go check

[mrg7243]

i didnt see anything, but check the egr plug under the tb, it runs by the IAC wire loom

[M-Rod]

That same plug on the V6 is for the knock sensor. I'm guessing it's the same for I4.

[Isaurio]

That same plug on the V6 is for the knock sensor. I'm guessing it's the same for I4.

I dont see the plug that goes to it. BUMP BUMP. Anyone check on your I4. Is under the intake mani by the middle.

[Isaurio]

i didnt see anything, but check the egr plug under the tb, it runs by the IAC wire loom

No is not the egr plug. Is already plug in or the evap.

[Isaurio]

Holy crap. I found out that it is the knock sensor plug. 99galantES, M-Rod yes is the knock sensor. The big question is where does it goes. How the ECU get the reading if don't if is not connected to anything, I got some pics. I was reading about the knock sensor and is very very important for the performance of the engine. If is bad or is not connected it leads to Bad acceleration, reduce on gas millage etc. Need to find where it goes.




Found this. I'm going to try following the wire. It should be with the evap, and egr connectors. mrg7243 let see if is around there.

[mrg7243]

here is a picture of where the knock sensor is
its actuallly 99galantES picture


but it would be beneath the water tube, my car does not have one i can tell you that

[Isaurio]

Yeah i know where it is but i dont found the connector on the wiring hardness.. I have to look more into it.

[99galantES]

as you can see i have one too but no connector idk why my old motor never had one

if you get it wired let me know

[Stewi]

Yeah i know where it is but i dont found the connector on the wiring hardness.. I have to look more into it.

Hey you didnt change motors or wiring harness' right? You just swapped over to the outlander manifold and thats it? If you only swapped manifolds that wiring connector needs to be somewhere. It's typically on the same harness as the wires for the MDP and injectors. Just take a good look for it.

[Isaurio]

Thanks stewi. I only swap the outlander mani. I will take a good look around the harness. It looks like the same plug the oil pressure switch uses.