Water trapped in the knock sensor?

Splinter · Post by **Splinter** » Tue Jan 17, 2006 9:19 pm

As anyone following the drama that is my life will know, Ive had a lot of water loose in my engine compartment due to various radiator foibles.

Before I was getting occasional knock codes, but now its always on, and the car has NO pull until about 4K

I dont know if the knock sensor has ever been replaced, but according to the documentation that I got with the car, it got a whole new engine about 60K ago, presumably they wouldnt have used the original sensor, but nothing is for sure.

Im wondering if its possible for some water to have gotten into the sensor, and it just needs to be removed and dried, since I really cant afford to buy a new sensor right now. I dont really want to mess around taking it out if Im just going to have to put it back in the way it is, especially with the intercooler in the way now.

If not, how safe would it be to run without a knock sensor, using some sort of trick to make the ECU think everythings ok, running on 91 Octane?

Post by **Legacy777** » Tue Jan 17, 2006 9:22 pm

Don't run without the knock sensor.

Do you know what color the plastic connector is on the knock sensor? Gray or White?

Splinter · Post by **Splinter** » Tue Jan 17, 2006 9:25 pm

I havent been able to see it actually

Im not sure exactly where I should be looking. I saw Gary's photo of ithe one on his... but I couldnt tell exactly what it was showing me.

If its grey, I know its probably cracked and should be replaced

What if its white?

sammydafish · Post by **sammydafish** » Tue Jan 17, 2006 10:29 pm

the knock sensor plug clips onto the little bracked directly under the throttle body. same place the crank and cam sensor plugs are anchored

dzx · Post by **dzx** » Wed Jan 18, 2006 12:28 am

It's a little ovalish kinda plug that's either white or grey, mine might have been dirty.

Post by **Legacy777** » Wed Jan 18, 2006 12:54 am

You can see the end of the white plug and the knock sensor in this pic
http://www.main.experiencetherave.com:8 ... P_2481.JPG

The white plug is the updated design.

dzx · Post by **dzx** » Wed Jan 18, 2006 12:58 am

Do you have pictures of everything josh?

Psychoreo · Post by **Psychoreo** » Wed Jan 18, 2006 3:57 am

i think the answer to that is: Yes. Josh has the pictures and Vikash has the diagrams.

Post by **Legacy777** » Wed Jan 18, 2006 9:05 pm

dzx wrote:Do you have pictures of everything josh?

Almost everything

Splinter · Post by **Splinter** » Wed Jan 18, 2006 10:06 pm

Yea thats the picture I was referring to, for some reason I thought it was Gary's...

anyway. I cant tell exactly what that picture is showing me, I cant find a comparable view inside my car. Plus the intercooler is in the way now.

HOWEVER.

The CEL suddenly went out, randomly, and the car is working fine now.

Which leads me to the conclusion that there must have been water trapped in the sensor or in a connector, and its gone now.

dzx · Post by **dzx** » Thu Jan 19, 2006 12:31 am

That is a picture of the engine on the driver's side towards the firewall. In his picture he has the intake manifold removed but normally where it plugs in is directly under the throttle body.

Splinter · Post by **Splinter** » Thu Jan 19, 2006 2:40 am

Ahhh thats why I couldnt make sense of it

92whitelegacy · Post by **92whitelegacy** » Thu Jan 19, 2006 7:23 am

i had a problem wit my knock sensor when it would rain, after the wrx hoodscoop. Now with this huge hole in my hood Everytime it would rain/snow my knock sensor un-willingy went swimming for 30-45 mins or untill the water evaporated/melted from engine heat. I actually fixed this by finding a n/a engine cover, and modding it to fit. Covers the knock sensor like it was its job.

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Water trapped in the knock sensor?

Water trapped in the knock sensor?