Some Wierd Sensor.. Or Something... ?

[justin911]

hey ppls

I was playing around near the starter motor today and right near it theres a bunch of 3-4 cables tied together.. One of the cables seems to have this yellow looking round sensor hanging off the end of it ??

It kinda looks like a cylinder and its got a hole in the middle.. Its about 3cm tall and 2cm wide or so..

There isnt much slack on the cable so im pretty sure it goes somewhere near the starter motor area.

My cars not having any issues or leaking anything etc, but it just seems odd theres a part just sitting there not plugged into anything ??

My engine was rebuilt a few months back so im thinking maybe someone forgot to plug it back in, woteva it is ??

Oh yeah im pretty sure its not some electrical connector.. cause ya theres no connection part on it...

I know my description isnt very good but hopefully someone knows what im on about.. I'll try take a pic of it tommorow.

[Cubes]

Both knock sensors plugged in?

[justin911]

hmm knock sensor ay..

where bouts do they plug into ??

my pfc seems to show knock, but ya maybe it still works fine with just the 1 plugged in ?

[justin911]

i just had a look in nissan fast for a picture of a knock sensor...

assuming the picture is accurate the knock sensor looks like it kinda screws in somewhere (kinda like the o2 sensor from the looks of it) this thing looks like it just plugs in somewhere though.

[Duncan]

yellow round sensor about 5cm long? thats the oil pressure sender

[Cubes]

Its not just the round plug that kind of screws in to the knock sensor? Or is there clearly a big arsed sensor hanging down?

With regards to the oil pressure sender... I've seen a few different colours, red, yellow and blue. I have a blue one.

I've attached a picture of the drivers side of the motor.

You can see the knock sensors as they have a little green lug. This is very close to the starter motor.

The plugs are obviously a nice little round plug that kind of screws on.

The motor obviously had a tad blowby, as you can see the oil stained the center 3 ports slightly, this would indicate the center 3 ports receive a tad more air than the front and rear.

I guess this could relate to the plenum flow thread.

[justin911]

nah not the oil sender, i know which one that is and shes definietly plugged in.

It looks like it might plug into the knock sensor... on the knock sensor do they they have a little bit in the middle ??? sorta like a male connector... and then the part that plugs into (thing im on about maybe) has the female part... ?

one last thing should i be able to easily plug her back in if it is the knock sensor or am i going to need to pull heaps of crap off to access it ??

[Cubes]

Yer that sounds like the plug for the sensor... A little male type round plug.

It pushes on with a little force due tothe o-ring and you then turn it slightly to lock it in.

[justin911]

the other knock sensor looks abit easier to access.. if i was to yank that one out.. in theory if the other one is unplugged the knock on my pfc should constantly remain at 0 right ???

[justin911]

cool thanks heaps for the help

Perhaps next time i'll get you to install the engine

[Cubes]

the other knock sensor looks abit easier to access.. if i was to yank that one out.. in theory if the other one is unplugged the knock on my pfc should constantly remain at 0 right ???

I would assume so.

[justin911]

took off my starter motor just now, and there she was.. a green knock sensor.. all plugged in again now

thanks heaps cubes