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  #1  
Old 12-02-2012, 09:40 PM
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Narrow down all these opinions for me...

Okay, I've been doing hours of research on these forums with no concise results. Everyone seems to have a different, entirely right opinion on the same thing. Please continue reading after looking at this picture (not my car):



*The colored dots are all hoses, and the thick (orange and black) arrows are pointing to the nipples. The teal and pink arrows are pointing to the rubber hoses, NOT the lines, meaning taking the hose off of the line completely.*

I'm just going to reiterate everything here in case someone didn't see it on other threads, because I really want to get to the bottom of this. I have a '92 with no modifications other than a transmission cooler and some audio stuff. My car runs absolutely perfect. Idles as smooth as butter at ~650rpm, has stalled only once in my three years of owning it, I think the TPS needs to be adjusted, blah blah blah. I have a check engine light. It is for the EGR. My year SVX only has that one sensor, code 34 I think it is, just showing that the EGR is dirty. I have a bottle of seafoam, as a friend and some other random sources said that it couldn't possibly hurt to try. After a bunch of research, I found out that the vacuum line I wanted to put seafoam into would be BLUE dot. To be more specific, NOT the nipple, but the hose. Unplug the hose from the nipple (black arrow), cover the nipple, and stick the hose in the seafoam. I used a clear shot glass full of seafoam as to not flood the engine. Getting the engine to it's ideal operating temperature, I stuck the hose into the seafoam. Nothing. Didn't suck, didn't blow, nothing. The nipple wasn't doing anything either. Turned the car off. Waited a little, as Icingdeath told me that there is possibly a solenoid that hinders vacuum flow through that line, and tried again. Still, nothing. Frustrated, I did some more forum searching, and tried the RED dot. Took the hose out, stuck it in the shot glass, and covered the nipple as before. Nothing. BUT THEN, it started, very very slowly to suck in the seafoam. Then I took it out of the glass, and it started to spit a little bit of it back, and was blowing a very small amount of air. I tried to duplicate this, and it didn't do anything the next time I tried it. The nipple (orange arrow) on the passenger side of the car seemed to have a bit of suction to it when the hose was sucking the seafoam, but not very much. I proceeded to put the shot glass up to the nipple, and it sucked some of it in [all this time, less than 1oz of seafoam total was in the car's vacuum system]. Knowing that this worked, I took off a small amount of hose from my windshield washer line and put it onto the (black arrow) driver side nipple. It started sucking in the seafoam, and I proceeded to put about a fourth of the can into it, then shut the car off immediately. 10 minutes later, Started it back up, and it smoked for about 3 seconds, then nothing. Didn't have a hard time running or anything.

Did I do this right...?

SO many people say put it in the blue dot. NO, THE GREEN ONE. no the YELLOW ONE. etc. etc.. etc...

Which hose do I use?

The blue one had no suction at all. The red one had a little. I didn't try the green or yellow ones. Some people said to use the teal or pink arrow lines, which would in turn lead back to either nipple.

Again, I'm not entirely interested in cleaning out the throttle body. I would just really like for the seafoam to pass the EGR and attempt to clean it out.

The other thing, it could be a coincidence or not, but because my EGR is bad, it throws a CEL. The CEL only comes on when the engine is warm. I've never turned the car on in the morning for the first time that day and got a light. If it's cold enough out and I let the car sit, the light won't show up either. If I go into walmart for 30 minutes and come back, boom, CEL on. Now, I went to park the car tonight after unsuccessfully seafoaming it, and turned it off. Turned it back on: no CEL. Off... on: no CEL, still. And then one more time. No CEL. It might just be a coincidence, but I'm not sure.

Can someone please tell me where to put it? Everyone has a different opinion. I want to hear them though. Please describe which hose/nipple with the colors in my photo so I (and others in the future) can know which line you're talking about.

As far as I know from what people have said here, the brake booster line (not pictured) is a no-go, since it only goes to one cylinder and can flood it. The blue dot hose should pass by the EGR. The red one goes to the engine, but not the EGR. The orange and black arrow nipples (pink and teal arrows, also) go into the throttle body. The yellow dot goes into the engine and is a good one, but doesn't touch the EGR. The green one is bad and can flood the engine by sucking up a lot of fluid. The white dotted ones in the back can also be used, but I'm not sure what for. I want any help I can get. Help me seafoam my car, but through the EGR.

[/retardedly wordy description]
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  #2  
Old 12-03-2012, 02:15 PM
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Re: Narrow down all these opinions for me...

I guess I've been doing it wrong - I would put it in the blue dot but into the nipple - not the hose - so that it would get sucked into the throttle body.

Of course, the last time I did it with one of those 3M complete engine cleaning kits I loosened both of the big hose clamps holding the snorkel onto the throttle body and slipped a small hose into each and let it suck in.
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Old 12-03-2012, 02:28 PM
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Re: Narrow down all these opinions for me...

Ok, I just realized I made a mistake. The blue dot hose is where the solenoid gets vacuum from, so if you disconnect it, there won't be any vacuum to pull the seafoam through the solenoid. You need to disconnect it from the other side of the solenoid and run the seafoam through it on that side. Have a look at this vacuum diagram (it's for an OBD2 car, but the EGR part of it should be the same) and see if you can find the line on the other side of the solenoid:



Whether it will have enough vacuum to flow the seafoam with the EGR solenoid closed it another question, but we can force the solenoid to open if needed.
Attached Images
File Type: jpg Vacuum System.jpg (44.6 KB, 1752 views)
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Old 12-03-2012, 03:01 PM
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Re: Narrow down all these opinions for me...

So Icing, are you saying to feed the seafoam into the orange arrow nipple and let that suck it in? I did about half a shot (0.7oz) into that nipple, and it sucked it in, but I didn't know if I should keep going or not. I still have most of the seafoam left. I'll try it there if that's what you're saying. That passenger side line definitely goes through the EGR valve and it looks like it would then pass through the EGR solenoid too. Are you saying it might not reach the solenoid?
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Old 12-03-2012, 03:17 PM
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Re: Narrow down all these opinions for me...

Maybe I have this wrong, but you are trying to fix a code 34. This is due to the passage from the EGR to the inlet manifold being blocked with carbon. Running Seafoam through the EGR vacuum lines won't do it, it won't get to this passage.
You need to clean the gas passage that runs from the EGR, through the manifold. If you can feed the Seafoam into the passage where the temp sensor is, there maybe enough vacuum to pull it through to the inlet.

Harvey.
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Old 12-03-2012, 05:37 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by oab_au View Post
Maybe I have this wrong, but you are trying to fix a code 34. This is due to the passage from the EGR to the inlet manifold being blocked with carbon. Running Seafoam through the EGR vacuum lines won't do it, it won't get to this passage.
You need to clean the gas passage that runs from the EGR, through the manifold. If you can feed the Seafoam into the passage where the temp sensor is, there maybe enough vacuum to pull it through to the inlet.
The code 34 I think is just for the solenoid function, and would not be due to the intake manifold line being blocked. (Not 100% sure, I must confess). It's a 92, which lacks a temp sensor at the intake manifold's EGR port, so I don't think that the code would be due to that. Code 56 in the later cars I think would be due to that.

Although that passage probably is clogged, we're not too worried about the EGR actually working, only getting rid of the code.

Quote:
Originally Posted by B 4 You View Post
So Icing, are you saying to feed the seafoam into the orange arrow nipple and let that suck it in? I did about half a shot (0.7oz) into that nipple, and it sucked it in, but I didn't know if I should keep going or not. I still have most of the seafoam left. I'll try it there if that's what you're saying. That passenger side line definitely goes through the EGR valve and it looks like it would then pass through the EGR solenoid too. Are you saying it might not reach the solenoid?
No, I'm suggesting to feed the seafoam through the line that goes from # 11 to #13 in the diagram I posted, if you can actually get to it in the car. The orange arrow I'm not altogether sure what that would hit, the route is a bit more complicated.
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Old 12-03-2012, 05:49 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by icingdeath88


No, I'm suggesting to feed the seafoam through the line that goes from # 11 to #13 in the diagram I posted, if you can actually get to it in the car. The orange arrow I'm not altogether sure what that would hit, the route is a bit more complicated.
So what we want the seafoam to go through then is the EGR valve, #13 in the diagram? Would I just take off the rubber hose at the EGR control solenoid and put into that hose? Also, if I just decide to screw the EGR thing altogether, where is the best place to put seafoam into? I read about putting an accessory hose onto the yellow dot and pouring it into there
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Old 12-03-2012, 06:05 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by B 4 You View Post
So what we want the seafoam to go through then is the EGR valve, #13 in the diagram? Would I just take off the rubber hose at the EGR control solenoid and put into that hose?
You'd disconnect the hose at #13, so that the seafoam will flow through #11, then through the blue dot hose, into the intake to be burnt. But I am not near the car right now to see if that's physically possible.

Quote:
Originally Posted by B 4 You View Post
Also, if I just decide to screw the EGR thing altogether, where is the best place to put seafoam into? I read about putting an accessory hose onto the yellow dot and pouring it into there
I would go with the big giant hose that goes through the IACV, to clean that out. It's underneath the black intake tube, and the IACV is one of the most important parts of the intake. Other than that, whichever hose seems easiest to you. The yellow dot hose would be pretty easy, especially if you do have some extra hose the right size.
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Old 12-03-2012, 06:05 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by oab_au View Post
Maybe I have this wrong, but you are trying to fix a code 34. This is due to the passage from the EGR to the inlet manifold being blocked with carbon. Running Seafoam through the EGR vacuum lines won't do it, it won't get to this passage.
You need to clean the gas passage that runs from the EGR, through the manifold. If you can feed the Seafoam into the passage where the temp sensor is, there maybe enough vacuum to pull it through to the inlet.

Harvey.
Harvey,
Any chance it could be snaked out with something, may be a guitar string or is it just inaccessible?
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Old 12-03-2012, 07:54 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by icingdeath88

I would go with the big giant hose that goes through the IACV, to clean that out. It's underneath the black intake tube, and the IACV is one of the most important parts of the intake.
Do you have a picture of this specific line? Or it it visible in my picture? The problem is I have read about the IACV line a dozen times but no one has a picture of it, just a general description.
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Rear wheel drive
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Subaru XT shift knob

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Old 12-03-2012, 08:19 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by B 4 You View Post
Do you have a picture of this specific line? Or it it visible in my picture? The problem is I have read about the IACV line a dozen times but no one has a picture of it, just a general description.
It's usually not visible in pictures, because it's underneath the throttle bodies. I'll get some pics for you here in a few minutes.
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Old 12-03-2012, 08:20 PM
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Re: Narrow down all these opinions for me...

here is a general image
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Old 12-03-2012, 08:27 PM
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Re: Narrow down all these opinions for me...

I found one of my pics that has it shown very clearly

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Old 12-03-2012, 08:55 PM
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Re: Narrow down all these opinions for me...

^ Yea, the above pic is from the passenger side. Here's one from the other side. The IACV line is the big vac line with the zip tie on it in this pic (yours shouldn't have a zip tie ). The car [i]will[/] die if you unhook this line from the intake while it's idling. I think it would be best to undo the line while the car's off, then pour a bit of seafoam in the line, start it up, wait for what you put in the line to clear, then repeat until it seems like enough. Undo the line where it's shown connecting to the intake in 92svx's pic.



Here's a pic of the vac line that goes to the EGR solenoid from the other side. (Although the car is a 94, the engine is a 92, so it should be exactly the same.) It is the topmost line of several that are kind of stacked right here. I don't think you can get the other end of this hose off very easily, but you should be able to get this end off, and the put a spare line on the hard line instead. Hopefully it has some vacuum, if not when cold, then perhaps when hot. Otherwise we can try tricking the solenoid into opening if you want.

Attached Images
File Type: jpg egr sol line.jpg (102.8 KB, 794 views)
File Type: jpg IMAG0365.jpg (62.8 KB, 697 views)
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'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

Now a mod "over there" ............Photo album
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Old 12-04-2012, 02:59 PM
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Re: Narrow down all these opinions for me...

Quote:
Originally Posted by Sean486 View Post
Harvey,
Any chance it could be snaked out with something, may be a guitar string or is it just inaccessible?
Sean I remember some one doing this a while ago, can't remember who though. He cleaned the passage with a wire, poking it through from both ends to clean it out.

Harvey.
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