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Old 03-16-2010, 03:42 PM   #1
Type2
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Default Is this an EGR Solenoid? (see picture)

Info:
1995 Subaru Impreza L Wagon, AWD
2.2 L MAF based engine (with MAP)
Automatic
OBDII

Well, in my year-long quest to get my check engine light to turn off I have finally narrowed it down to just a couple things. It's the classic P0400 code... I have read and reread all available material on this and have methodically been narrowing it down (minus measuring values with an ohmmeter). I have replaced the EGR valve, cleaned out the metal tubes, replaced all the vacuum lines, replaced the MAP in line filter. I was 99% sure that the EGR Solenoid was the culprit.

I ordered what I thought was the EGR Solenoid Valve at 1stSubaruparts.com -- confirmation of the order was this:

Items Ordered:
Item: Emission system, Egr system, Solenoid valve, Solenoid valve, impreza, 2.2l
Price: $59.11
Tax: $0.00
Qty: 1
Total: $59.11


I gave them my VIN so I would be able to return the item and for more accuracy on the order.

When I received this I was initially suspicious. I thought the EGR Solenoid Valve belonged on the Throttle Body, and that this looked more like something else, perhaps the MAP sensor.

Here is the new part installed:



Another picture of the new part installed:



Here is my Old Part:



Another pic of my Old Part:



I installed this part, reset the computer and drove it up for several miles at highway speed making sure to get up past 55 and slow down then back up past 55. Did this a few times. Light stayed off... that is until yesterday. Now I think I might have got the wrong part.

Can someone PLEASE confirm whether this is indeed the EGR Solenoid valve, or if I got something else entirely.
For what it's worth, I have never been able to find EGR Solenoids online for my car. Only for Legacys although we share the same engine.

Thanks for any help. And if this is not the EGR Solenoid valve, can anyone enlighten me as to the official part number so I can just walk in to the Subaru dealership and order this thing in person.

Chris

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Old 03-18-2010, 03:08 PM   #2
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Where should I post this question? I don't want to cross post but I don't think anyone knows what an EGR valve looks like, or at least those who hang out in the newbie FAQ section.
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Old 03-18-2010, 03:19 PM   #3
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id post it in one of the tech forums....sure a mod can move it as necessary though
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Old 03-18-2010, 04:52 PM   #4
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Old 03-18-2010, 09:32 PM   #5
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Quote:
Originally Posted by ToneWrx02 View Post

That part looks very similar to my part, so perhaps I did get the correct part. Well, darn it. I am at the end of my rope with this P0401 check engine light. I don't really know what else to replace except for perhaps the transducer. I'm at a loss. I'm tired of 15mpg in town and 21 highway. It's been a gas sucking pig for the last year.
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Old 03-18-2010, 10:06 PM   #6
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does an EGR problem typically result in poor mileage?
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Old 03-18-2010, 10:12 PM   #7
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Solenoid Valve For Egr ...... 1993-2001,
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Old 03-19-2010, 01:34 AM   #8
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Quote:
Originally Posted by AWDBrad View Post
Solenoid Valve For Egr ...... 1993-2001,
Hey man thanks for the input but I'm not really sure what you're saying.

I want to know if this picture I have is an EGR valve or not. Thanks!
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Old 03-19-2010, 02:23 PM   #9
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he is saying it is the Solenoid Valve For Egr and I too.
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Old 03-19-2010, 02:30 PM   #10
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most of the time, it failed because gluey dirty stuck the vale movement inside. All you need to do is to spray some brake cleaner through all 3 holes, then engage a 12VDC to 2 of the three contacts. You will be able to listen to the valve open and close as you apply voltage. Blow with you mouth to see if air is coming/stopping before and after the cleaning. takes minutes to clean.
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Old 03-19-2010, 04:27 PM   #11
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Quote:
Originally Posted by Jerry Xu View Post
most of the time, it failed because gluey dirty stuck the vale movement inside. All you need to do is to spray some brake cleaner through all 3 holes, then engage a 12VDC to 2 of the three contacts. You will be able to listen to the valve open and close as you apply voltage. Blow with you mouth to see if air is coming/stopping before and after the cleaning. takes minutes to clean.
Any idea on how to clean and test the transducer? That's the only thing left I can think of to replace.

I'm thinking of putting my original EGR valve (not solenoid valve) back on because the one that I bought off ebay I think was off a 2.2L legacy. Perhaps they are not interchangeable. My EGR valve was quite clean, as well as the pipe connected to it.
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Old 03-19-2010, 08:32 PM   #12
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Do you have any pictures of the intake manifold and the EGR in particular? On my EJ25, the EGR solenoid is mounted to the intake manifold just below the EGR valve.

I have those same 2 sensors/solenoids on the passenger side strut tower, but based on what I see on my car I'm not sure what you replaced is the EGR solenoid.

Pat Olsen
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Old 03-22-2010, 12:07 PM   #13
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Quote:
Originally Posted by Patrick Olsen View Post
Do you have any pictures of the intake manifold and the EGR in particular? On my EJ25, the EGR solenoid is mounted to the intake manifold just below the EGR valve.

I have those same 2 sensors/solenoids on the passenger side strut tower, but based on what I see on my car I'm not sure what you replaced is the EGR solenoid.

Pat Olsen
OK just double checked and you are correct. What I replaced was NOT the EGR solenoid. I understand why everyone above thought it was -- they look nearly identical. Here are a couple shots of the actual EGR Solenoid Valve on my engine, mounted to my intake manifold.



Close up picture:




Also, for reference, here is a picture of the new part I bought (What I thought was the EGR Solenoid):



Here is a picture of what I took off the car yesterday:



They look nearly identical except for the mounting part and of course the Part Numbers are different. Oh, and the EGR Solenoid Valve has a "tin can" breather box that slides on.

One thing I was able to confirm was whether my old EGR Soloenoid Valve is clogged, and yes, it was very clogged. I sprayed brake cleaner in as someone recommended and it didn't help.

Anyway, I put my old, clogged up EGR Solenoid Valve back on, but not before I seriously debated putting the new part on. I would like everyone's opinion here. I noticed that the new and old part, although they differ by part number and the mounting points are slightly different -- does anyone think that these two parts are basically identical in function? Would it hurt anything to see if it worked?

Thanks
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Old 03-22-2010, 12:53 PM   #14
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This plagued me for well over 4 months. I had added Grimspeed 8mm spacers to my intake manifold on my 98 RS and had to cut the EGR tube. Cutting this tube with a sawzall must have broken loose carbon buildup in the EGR tube.
This is what I did to remedy the issue:
I had replaced all rubber tubing from EGR all the way to the MAP sensor.
I rinsed out the inline MAP filter to get all of the gunk out of it.
I got another EGR tube and had taken the cut one out and then cut the new one to fit perfectly and welded it together for a perfect fit.
Took the transducer off and cleaned it out the best I could.

Once I cleaned the transducer, the CEL went away and has been away for 3+ months now.
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Old 03-22-2010, 01:01 PM   #15
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Quote:
Originally Posted by Gr3en View Post
This plagued me for well over 4 months. I had added Grimspeed 8mm spacers to my intake manifold on my 98 RS and had to cut the EGR tube. Cutting this tube with a sawzall must have broken loose carbon buildup in the EGR tube.
This is what I did to remedy the issue:
I had replaced all rubber tubing from EGR all the way to the MAP sensor.
I rinsed out the inline MAP filter to get all of the gunk out of it.
I got another EGR tube and had taken the cut one out and then cut the new one to fit perfectly and welded it together for a perfect fit.
Took the transducer off and cleaned it out the best I could.

Once I cleaned the transducer, the CEL went away and has been away for 3+ months now.
Thanks for the advice. I've replaced all the rubber tubing, replaced the MAP inline filter, checked EGR Tube (it's spotless) and replaced the EGR Valve.

Now that I know my EGR Valve Solenoid is bad, I am curious if I can put that other *nearly* identical part on?
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Old 05-10-2010, 03:43 PM   #16
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Default Update: replaced EGR Solenoid - CEL still on

Ok, I don't want to start a new thread, so hopefully I'll get some eyes on this. Well, my P0400 check engine is still plaguing me. I replaced the EGR solenoid and no go. Before I set my car on fire and roll it off a cliff, I have a couple questions:

1. I have a used EGR valve off a 2.2 Legacy (ebay) on my car. My car is a 2.2 impreza. Do you think this might be the lingering problem? Should I put the original back on? I still have the original EGR valve. This was the first thing I replaced about a year ago.

2. What is the best way to clean the Transducer? Can I use carburetor cleaner dip?

3. Same with the EGR valve

Maybe I fixed the problem when I replaced the EGR Solenoid but the 2.2 Legacy EGR Valve is incompatible so still causing the CEL? The original EGR Solenoid was clogged. Thanks

Last edited by Type2; 05-10-2010 at 03:50 PM. Reason: organize post better
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Old 05-11-2010, 02:25 PM   #17
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Today I pulled off the 2.2L Legacy EGR Valve and decided to replace it with my original EGR Valve. I dipped my original in carburetor cleaner for about 30 minutes then sprayed it out. It's quite clean now and works ok. As you can see (below) the 2.2L Legacy EGR Valve had a lot of moisture.

I also took off the transducer and blew on it. It seemed clogged, but I cant be sure. I went ahead and dipped it in carburetor cleaner as well. Gonna let it soak for about an hour then reinstall it. I started my car without the transducer and it ran just like it normally does. I'm not sure if that's a good thing or bad thing? I also noticed a lot of moisture blowing out of the larger tube that feed the transducer (pics below). I realize no one is commenting on this thread except me, and maybe people don't have an answer, but if you happen to stumble by this thread, I'd really appreciate your thoughts!

2.2L Legacy EGR Valve:







Transducer feed tube (from EGR Valve). Notice the large amount of moisture:





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Old 05-11-2010, 05:39 PM   #18
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Can't see the pics at work, but just wanted to let you know someone cares enough to read about your continuing trials and tribulations.
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Old 05-11-2010, 06:50 PM   #19
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Quote:
Originally Posted by Patrick Olsen View Post
Can't see the pics at work, but just wanted to let you know someone cares enough to read about your continuing trials and tribulations.
^^Thanks, It means a lot.

Well, I soaked the transducer for about an hour and it seems there was a bunch of gunk in it. The liquid that came out of the bottom was much darker than the carburetor dip, so I am assuming it was gunked up. I don't know if I got it all out or not. It makes no impact on the engine whether it is attached or not...

I took it for a drive and the CEL came on after a hard pull, about 10 miles later. I'm running out of things to replace. In fact, I don't think there is anything EGR related that I haven't checked or replaced now.

I'm starting to debate whether to keep this car. I bought it for AWD and decent gas mileage. I'm getting 20 highway, about 15 in town. Might as well have bought a 6000lb SUV
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Old 07-25-2011, 11:12 AM   #20
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Default EGR valve

I seem to have a problem with my egr valve. It seems to be working on acceleration but the check engine light remains on. Do we to have the check engine light reset or is there something else wrong? Thanks for any replies
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Old 07-24-2012, 09:53 PM   #21
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Default May be having similar issues

I have a 95 impreza L thats been through a swap from 1.8 to 2.2 and is turbocharged. I am getting error code 62 (it's an odb1) but i have 3 different docs saying that the error code is either egr solenoid, fuel temp, or exhaust negative pressure i found some kind of 2 pin connector up by the intercooler and my guess would be that it went to egr. I may have to take off the intercooler to ever see if i can find where it went. I mean maybe when it was swapped they just said whatever egr i don't want it. But what code did you get?
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Old 07-24-2012, 11:21 PM   #22
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Egr selinod is under the egr valve on that engine.
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Old 07-28-2012, 02:23 AM   #23
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Default dont drive it off a cliff yet.

Quote:
Originally Posted by Type2 View Post
^^Thanks, It means a lot.
dont drive it off a cliff yet . it really sounds like the transducer since it runs the same when its on or off . and also probably put the old egr back on .google how to check them maybe get a diffrent one if it is stuck .hoping to hear how that turns out.
Well, I soaked the transducer for about an hour and it seems there was a bunch of gunk in it. The liquid that came out of the bottom was much darker than the carburetor dip, so I am assuming it was gunked up. I don't know if I got it all out or not. It makes no impact on the engine whether it is attached or not...

I took it for a drive and the CEL came on after a hard pull, about 10 miles later. I'm running out of things to replace. In fact, I don't think there is anything EGR related that I haven't checked or replaced now.

I'm starting to debate whether to keep this car. I bought it for AWD and decent gas mileage. I'm getting 20 highway, about 15 in town. Might as well have bought a 6000lb SUV
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Old 07-29-2012, 06:42 PM   #24
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Wow, this is an old thread. I eventually fixed the problem. If I recall correctly it was the backpressure transducer. I replaced it and the code never came back. I sold the car in Dec 2011 and got a 2004 FXT. Much more fun to play with. And many many more headaches lol
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