phantom knock gone!!!

[GORBS88]

hey, just thought i would share this with you.....i have been fighting this for 2 years..you can find some of my other posts...well i tryed to run a 2g sensor and like others said it didnt work....set a code...well i compared sensors and the reason 2g one is less sensitve is it doesnt have a hole up the shaft like 1g one....so i thought the heck with it i need to fix that.....the only wa y was to weld hole closed....thought there was nothin to loose...put it in and fixed....still have my normal 5-10 counts of knock in high rpm but pk gone all together......i am so happy now....not sayin you guys should do this but real knock is loud so the sensor still picks it up real easy......it now resembles a 2g one.....

 

[12sec92Tsi]

Thats a great idea! I am experiencing pk now and just got my new sensor in the mail today. Im going to put it in and see if it cures my pk, and if it doesn't I will try your method of welding the hole shut. Thanks for sharing that helpful info!

 

[project_tsi]

Im also experiencing PK now and I think I may try sealing the hole as well. Do you think JB weld would work, or should I just weld it shut w/ a wire feed welder? I use DSMLink and it does a decent job at ridding PK but not good enough. I get sick and tired of getting 5+ counts of knock while cruising at 60mph for a split second, and having to lift of the throttle for a sec in order to cure itself.

I may definetly try this method, as long as someone else doesn't have a good reason not too.

 

[GORBS88]

yah as far i can see theres no bad side affects.....i get exactly the same amount of knock in high rpm, so dont see any troubles..... .....now when goin down the highway i dont have to worry about 43 counts comin on and havin to let of and then it goes away....its awsome......like a new car......

 

[GORBS88]

ohh yah forgot to answer your question....jb weld should work but i wasnt waitin around for it to dry so i did it with a wirefeed....worked great....gotta make the weld small so dont hit the threads......

 

[project_tsi]

so did you fill the entire hole w/ weld? or did you just weld right over the top of it?

 

[GORBS88]

so did you fill the entire hole w/ weld? or did you just weld right over the top of it?

just welded over the hole on the end...never filled the hole...it still has that brown goo in there......thanx

 

[project_tsi]

So, Im confused. Did you weld over the side w/ the goo? The side w/ the wire coming out? Or is there a small hole drilled in the threaded portion of the sensor that you welded up?

 

[GORBS88]

So, Im confused. Did you weld over the side w/ the goo? The side w/ the wire coming out? Or is there a small hole drilled in the threaded portion of the sensor that you welded up?

you need to look at sensor to see.....the back is the area with the wire.....i did not touch that...that has no affect on it.....on the threaded end that goes into block is the hole...so sound can travel into the sensor....it also has the brown goo in the hole....i just capped that hole at the threaded end....if you look at a 2g one it is like a bolt that goes into block...there is no hole in the end...now that i welded it up it looks like a 2g one....hope this helps.....just weld the end that goes in the block,...you will see the hole....on threaded end only.......later,

 

[project_tsi]

you need to look at sensor to see.....the back is the area with the wire.....i did not touch that...that has no affect on it.....on the threaded end that goes into block is the hole...so sound can travel into the sensor....it also has the brown goo in the hole....i just capped that hole at the threaded end....if you look at a 2g one it is like a bolt that goes into block...there is no hole in the end...now that i welded it up it looks like a 2g one....hope this helps.....just weld the end that goes in the block,...you will see the hole....on threaded end only.......later,

Thats what I thought. I am familiar w/ the 1G knock sensor quite well actually, I just wanted to be 100% sure. I honestly didn't know the sensors were different internally, never had a 2G.

 

[Kapok6]

hey, just thought i would share this with you.....i have been fighting this for 2 years..you can find some of my other posts...well i tryed to run a 2g sensor and like others said it didnt work....set a code...well i compared sensors and the reason 2g one is less sensitve is it doesnt have a hole up the shaft like 1g one....so i thought the heck with it i need to fix that.....the only wa y was to weld hole closed....thought there was nothin to loose...put it in and fixed....still have my normal 5-10 counts of knock in high rpm but pk gone all together......i am so happy now....not sayin you guys should do this but real knock is loud so the sensor still picks it up real easy......it now resembles a 2g one.....

OK, I have been battling PK for over a year know, I know it's PK b/c it knocks up to 43 before even hitting boost, and I only run 93 octane and stock boost. Now, I put in the 3rd gen lifters and a new knock sensor (spent 3 1/2 hr and got my hands and arms all cut up) buts it still shows knock, not as bad, but still goes up. What I want to know is how come if I am accelerating and it shows knock, then I let off the gas and then punch it again, it will show no knock?

 

[GORBS88]

OK, I have been battling PK for over a year know, I know it's PK b/c it knocks up to 43 before even hitting boost, and I only run 93 octane and stock boost. Now, I put in the 3rd gen lifters and a new knock sensor (spent 3 1/2 hr and got my hands and arms all cut up) buts it still shows knock, not as bad, but still goes up. What I want to know is how come if I am accelerating and it shows knock, then I let off the gas and then punch it again, it will show no knock?

because its phantom knock...thats why it comes and goes....its in the name...it will start at low rpm.....if you rev up slowly to 4000-4500 then hit it....most times it will be fine....try the knock sensor mod.....worked for me..

 

[Kapok6]

because its phantom knock...thats why it comes and goes....its in the name...it will start at low rpm.....if you rev up slowly to 4000-4500 then hit it....most times it will be fine....try the knock sensor mod.....worked for me..

I drove her all this weekend, and when she isn't showing knock, she pulls HARD. As for the knock sensor mod, I would love to do it, but I just really don't want to take another 3 1/2 hrs to get that sucker out just yet. I have a 255 fuel pump, built tranny, prothane motor mounts that I need to install, so I will probably take it out and weld the hole shut when I do all that wonderful stuff. Thx for the advice man.

 

[Steve93Talon]

Assuming you removed the intake manifold bracket while you were under there, swapping knock sensors should take you 10 minutes now.

 

[Kapok6]

Assuming you removed the intake manifold bracket while you were under there, swapping knock sensors should take you 10 minutes now.

Yeah, I should definitely be able to get it done much faster now that I know how to do it, but I still have to drop the down pipe, otherwise I cant get my arm up there, and to get the old sensor out, I had to cut the cord and us a 19mm socket b/c there is no room to move a wrench around up there.

 

[AL92]

I had terrible phantom knock in my 92. I put in new knock sensor,tried lots of stuff,never swapped lifters though and did see higher knock when car was cold so maybe lifters but I had to buy new eprom ecu and get custom chip to eliminate it in my car.
Nice to see you may have found a solution.

And I posted my method to change out knock sensor pretty sure on this forum in one section forget which one..tips section or something.been awhile since been on here.
Bascially you car go to drivers side and reach under there and take the knock sensor out and reinstall it without having to touch battery or anything. Its a little weird to do but I did it no problem and I am not even double jointed or anything..

Seriously see if you can find my post on it..

 

[candela]

Wow its good to browse these forums again and see that old problems are starting to be fixed now. I remember dealing with this issue for months trying different things.
Hopefully the whole welding deal works for people; I beleive its for resonance and by shielding it you are basically eliminating a lot of otherwise smaller pick ups. I actually triedusing all sorts of fills in my 1g sensor but never thought to weld it

 

[conceptvip]

Im not sure if any one will replay to this post seeing that its an older tread. I am in the process of putting my freshly rebuild motor together with a brand new oem knock sensor (1g) and I use to have the problem with the knock sensor picking up the external dump. woudl it be a good idea for me to plug the hole in the knock sensor?

 

[ADrewzki]

Im not sure if any one will replay to this post seeing that its an older tread. I am in the process of putting my freshly rebuild motor together with a brand new oem knock sensor (1g) and I use to have the problem with the knock sensor picking up the external dump. woudl it be a good idea for me to plug the hole in the knock sensor?

My opinion is to install the sensor as is. There are many people who use the sensor without having the hole welded and it works fine. The dsmers who have posted on this thread have decided to weld that hole shut because they have been unable to get rid of phantom knock. Once you get your engine together and you get pk, then I would recommend you try welding that hole closed. Until then, if it ain't broke....

-Andrew

 

[dnhieu]

i think im gonna try this. im sick of my knock sensor picking up my o2 dump. i checked my knock sensor the other day for the goo and its starting to goo out. i have a brand new o2 sensor and im going to get the tip welded shut. ill post some pictures when im done, along with a small review on if it worked for me or not.

thanks
david

 

[2GeNTSi]

I remember one day when I read up that the knock sensor might be the cure to all my problems, I decided to take a look at mine, and it was indeed leaking. I ordered one, threw it in, but yet I still have timing issues. I'm starting to think it's just my timing that is off or something because I remember taking a look at my base timing on my logger, and it was reading 5 at most. I don't know anymore.

 

[beatshack]

5* is correct base timing.