legacycentral bbs

Ok, I need either the kiss of death here or reassurance that I shouldn't put the wrenches down forever.

Story thus far

Installed intercooler... broke/fix coolant nipples.

Get Engine CEL code 22, reset still no go.

Do a D-Check and drive at around 40 km/h for around 3 minutes, constant flashing.. (according to documented facts, it means everything is cool)

Hammer down, notice car not as peppy as before (CEL Light immediatley returns to 22) ok, so Retarding timing...

Notice boost gauge not going up over 5 psi... assuming it has to do with the CEL and timing retardation...

Come home, total drive time 5 minutes total idle time before drive, 15 minutes and pop the hood and there is smoke coming off the turbo.... no scent, just thin white smoke..

What the hell happened?

I'm investigating without the intercooler as soon as things cool down enough to touch.

The "smoke" might just be steam from some coolant that spilled on the turbo when you were fixing the coolant tank or moving the coolant line, right?

Did coolant spill onto the knock sensor and/or its wiring harness?

Yes, that could be what it is.

I'm going to remove the knock senor and clean it and the block up (assuming my large hands can get in that tiny little hole

Hot coolant spilled on the Knock sensor on friday... during my first start the engine try, it did not throw CEL before that.....

I would've assumed that any coolant would already have been burned off the turbo since I ran at idle for around 15 minutes prior to going out for the drive....

Either way, it's another day of problems..

Yeah, problems suck...

The coolant could just be taking a while to burn/steam off, or maybe one of the coolant banjos isn't sealing properly. Are you sure you got all 4 old copper washers off? Did you use 4 new washers, and put them in the proper places?

I could imagine hot coolant damaging a knock sensor... you might have to replace it.

4????

I only took the top coolant line off, there were 4 washers? on the top?

They may not be sealing properly, but I didn't notice any drips or anything coming from that location...

Replacing the Knock, yeah.. that does suck. but there is someone local with one, we're just trying to figure out if it is the right kind...

http://img10.exs.cx/img10/7199/PICT5.jpg

that's it. not sure... oh well. we'll soon find out.

Turns out I did not have the upgraded one...

and if my spanish doesn't fail me

El Sensoro de Knocko Esta Crackinad

Oh... I thought you removed both the upper and lower coolant lines to cut the strip between them. If you only removed the upper one then there'd be two washers. The leak, if there is one, might only show up when the cooling system is pressurized.

That image does look like the redesigned Legacy knock sensor as I remember it... does it have a part number on it?

El sensor de detonación se ha grietado.

This is the only info I have on the part number..

It's a Bosch Part# 64 623

It looks exactly like the one in my hand, only a white connector instead of grey....


As for the leak, I'll keep an eye on it most certainly.

Pressurized as in high RPM's? or Pressurized as in a warmed up vehicle?

Hmm... I dunno; I didn't think Bosch made our knock sensors; I thought ours were made by Denso or JECS or Hitachi or something.

Hmmm indeed.

Would it hurt if I plugged it in and tried it?
or should I just say screw it and buy the one Omegax has for sale in the parts shed, knowing for sure it's off a legacy.

Well, if it's tuned for the wrong frequencies (are our sensors tuned? I don't know) then your engine could knock without the ECU knowing about it. I wouldn't risk it, since a brand new sensor costs like $35 from an online dealer...

Online dealer... yeah, I'd kinda like to check this one out at least. to see if it matches numbers with the correct part, that way I don't have to wait another 9 days for shipment of the part.

Oh please I just wanna drive my car again...

Oh please I just wanna drive my car again...

I know that feeling .

LegacyPunk555 wrote:

Oh please I just wanna drive my car again...

I know that feeling .

I think EVERY Legacy owner knows that feeling...

I know I do headgaskets

New knock sensor didn't do anything, even after an ecu reset.

Back to stock intake system now... can't shake code 22.

Did you examine the harness connector for the knock sensor? If there's dried coolant or something on it that could be bad.

I've been playing with the connections all day. (I've actually got the laptop outside with me)

Still same code.

I'm at a loss

i dont.

Die

Gonna try Vrg3's scantool today to see if anything is out of normal....

Of course I"m not 100% sure what to be looking for so all in all I may end up at subaru today..

This same thing happened to me when my coolant tank nipple broke. I got a new knock sensor and it had the white connector. It fixed my problem and it's worked perfect ever since.

Did you clean the block REALLY good where the sensor makes contact?

Well, not REALLY good because I"m not a shapeshifter. but I got in there the best I could with a rag soaked in carb cleaner on the end of a screwdriver.

Oh yeah I gots the tools for everything...


I'm going to go try the D-Check code clearing way since that's the only thing I haven't tried thus far.

Still throwing 22 after D-Check.

Is there an easier way to clean that area without completely ripping off the intake manifold?

Well how clean did you get it? Is it shiney clean? It's been suggested in the past by Ciper that people should use sand paper to 'buff' the area. I just wiped mine clean with a shop towel though but it worked great and I got it gleamin' clean. I call the area you're trying to clean the ' pit of dispair' so I understand your woe's. If you put in a new sensor and are still getting the code then there are a few possibilities. 1 the area isn't clean enough and you're not getting good contact. 2 somethings wrong with your wiring harness or 3 the new sensor is faulty (pretty long shot but it has happened).