egr valve
11-28-2004, 10:25 AM
#1
egr valve
i had been cel free for a little while now and it was so great, but when i jumped into my car this morning, that pos light came back on. it was code 0302 for the egr. one problem though. does anyone know where this is or what it looks like? the manual has pictures of a 94 max, but yea, i dont have one of those. so, i have been staring at the engine bay for a while in the cold with no idea. i want to try cleaning it to solve the problem, however, i cant clean it if i cant find it. any ideas?
11-28-2004, 10:56 AM
#2
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Join Date: Jun 2004
Posts: 158
11-28-2004, 04:05 PM
#4
yes, but its illegal for some reason and i dont know what itd do for emissions(isnt that the only reason its even there?) but i just left mine clogged, because it doesnt hurt anything or help anything,its just kind of a pita.
Please sens all donations to ME.
11-28-2004, 07:37 PM
#8
All the info you need can be found here.
http://forums.maxima.org/showthread.php?t=351657
In short the EGR system decreases part throttle fuel consumption, makes IM dirty as hel!, weighs 6Ibs, lowers CC temps, and clutters up the engine bay.
If you need EGR stuff I'll sell you mine. It worked perfectly with no codes.
http://forums.maxima.org/showthread.php?t=351657
In short the EGR system decreases part throttle fuel consumption, makes IM dirty as hel!, weighs 6Ibs, lowers CC temps, and clutters up the engine bay.
If you need EGR stuff I'll sell you mine. It worked perfectly with no codes.
11-29-2004, 07:38 PM
#9
has anyone here cleaned out their egr valve? it seems to be hidden under all the tubing and might be a b*tch to get to. how difficult would it be to remove it? chilton just mentions how to do this in like 3 steps, but i dont think thats the case.
11-29-2004, 07:42 PM
#10
Its easy with the engine out. I would imagine that would be a very difficult place to get at especially cause that fxcking EGR manifold port has a thread that is long as ****. I don't imagine it would be possible with the IM on.
11-30-2004, 06:46 AM
#11
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Join Date: Nov 2003
Posts: 106
I just cleaned my EGR valve this past weekend. I too, was getting code 0302 on and off for some time. The EGR valve is located right below the throttle body. It is hidden from plain view and you'll have to remove the MAF sensor and the air box to partially see it. As others have said the EGR itself rarely fails, so cleaning it will usually do the trick.
To remove it, you will also have to disconnect at least one of the two coolant hoses that are also in the way. There are two valves that look similar under the TB. One is the actual EGR valve and one is the BPT valve. The EGR is closer to the front of the car. To remove it you will need a 10mm deep socket (an extension will help). You will also need a huge wrench to loosen a nut on one end of the EGR valve. I don't remember the size but it's over 20mm. There is a small pipe that comes out of the EGR valve that connects to the BPT valve via a small vacuum hose. You may notice this hose worn or missing completely, (as it was on mine) so this may be the time to replace it. Once you remove the two 10mm nuts on the EGR valve and the larger nut on the side it will come out as one piece with the small pipe I mentioned above. There is also another vacuum hose at the top of the EGR that must be removed in order for you to completely remove the valve.
Once out, clean the valve really well with throttle body cleaner (do not use carb cleaner). Installation is the reverse of removal. I don't think its hard, just time consuming. This is also a great opportunity to clean your throttle body and IAC valve as well.
There is a great write up with pictures on an EGR removal on a VE engine, which is identical to our setup. The link I have is at home...I'll try to post it tonight.
To remove it, you will also have to disconnect at least one of the two coolant hoses that are also in the way. There are two valves that look similar under the TB. One is the actual EGR valve and one is the BPT valve. The EGR is closer to the front of the car. To remove it you will need a 10mm deep socket (an extension will help). You will also need a huge wrench to loosen a nut on one end of the EGR valve. I don't remember the size but it's over 20mm. There is a small pipe that comes out of the EGR valve that connects to the BPT valve via a small vacuum hose. You may notice this hose worn or missing completely, (as it was on mine) so this may be the time to replace it. Once you remove the two 10mm nuts on the EGR valve and the larger nut on the side it will come out as one piece with the small pipe I mentioned above. There is also another vacuum hose at the top of the EGR that must be removed in order for you to completely remove the valve.
Once out, clean the valve really well with throttle body cleaner (do not use carb cleaner). Installation is the reverse of removal. I don't think its hard, just time consuming. This is also a great opportunity to clean your throttle body and IAC valve as well.
There is a great write up with pictures on an EGR removal on a VE engine, which is identical to our setup. The link I have is at home...I'll try to post it tonight.
11-30-2004, 10:22 AM
#15
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Join Date: Jul 2003
Posts: 686
Originally Posted by VGinMIA
Yeah, just remember that code 0302 is flow to and from the EGR. The EGRC solenoid throws code 1005.
code 0302 could be any of the following (bottom of this page)
http://img52.photobucket.com/albums/...t=1egr0302.jpg
In my case it turned out to be EGRC solenoid valve.
11-30-2004, 10:46 AM
#17
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Join Date: Nov 2003
Posts: 106
Originally Posted by knight71
code 0302 could be any of the following (bottom of this page)
http://img52.photobucket.com/albums/...t=1egr0302.jpg
In my case it turned out to be EGRC solenoid valve.
http://img52.photobucket.com/albums/...t=1egr0302.jpg
In my case it turned out to be EGRC solenoid valve.
11-30-2004, 08:54 PM
#18
What is the BPT?
Channel locks work best on the Manifold EGR port. A wrench will have to be repositioned every ~1/8th turn but a channel lock will be simple if your skilled with it.
Channel locks work best on the Manifold EGR port. A wrench will have to be repositioned every ~1/8th turn but a channel lock will be simple if your skilled with it.
12-01-2004, 08:54 AM
#19
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12-04-2004, 11:46 AM
#22
i finally got to cleaning the egr valve. it wasnt too difficult to take out. maybe my car is different, but i used a 12mm deep socket with an extension as opposed to VGinMIA. the largest nut was the hardest because of its size and location. to get it off, i put the two 12mm nuts back on and then attempted again at the larger one, so that the small 12mm nuts would hold the egr in place better. the short rubber tube between the thin metal pipe of the egr and bottom of the bpt was a b*tch to get off.
one last question though, what exactly is supposed to be cleaned? i sprayed tb cleaner into the pipe that is connected to the largest nut and into the thin pipe on top of the egr. anything i miss? did i clean it properly?
one last question though, what exactly is supposed to be cleaned? i sprayed tb cleaner into the pipe that is connected to the largest nut and into the thin pipe on top of the egr. anything i miss? did i clean it properly?
12-04-2004, 01:47 PM
#23
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Join Date: Nov 2003
Posts: 106
Sorry man, my bad...it is a 12mm nut (the smaller ones). The way you cleaned your valve is the same way I cleaned mine. I'm glad you were able to do it! Hopefully your code will dissapear now. Incidently, I reset my ECU and I now get code 1005. So...I may have to replace the EGRC solenoid as others have done...
12-08-2004, 10:41 AM
#25
Broaner, ill take that egrc solenoid valve off your hands for $10 shipped considering that yours is about 10 years old and could give out at any time. jerry rome nissan is selling them for $52.47.
10-28-2006, 04:28 PM
#29
95% of the time the actual valve is NOT the culprit. The PIPE that connects from the EGR to the Intake is more than likely- CLOGGED.
Go here and look at these pictures of mine...
There's also a thread I started when I did it, and that is pretty comprehensive. Sorry I don't have the link right off hand.
Go here and look at these pictures of mine...
There's also a thread I started when I did it, and that is pretty comprehensive. Sorry I don't have the link right off hand.
05-29-2007, 06:46 AM
#30
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Join Date: Oct 2005
Posts: 46
Reading this thread, I looked at my EGR valve and verified that I have the 12mm two bolts that hold the EGR in, and the larger nut that is to the right that attaches a large pipe, and finally I have the small rubber tube going out the top of the EGR to the EGRBPV. However, I do not believe it mentions above the smaller metal tube coming from the bottom of the EGR valve. Is this also 12mm? All these nuts / bolts look pretty rusty on my 96 maxima, and it is pretty tight in there, so I just want to make sure.
here is a picture, of the EGR, you can see the two mounting holes, and at the top where the rubber hose connects, and sticking out to the right where the large pipe connects, and finally what I am asking about, the hole where there is another smaller pipe.
erg picture
Also, I get the impression that removing the EGR and cleaning it is possibly only part of the job, and that I should be cleaning the metal pipes. Those looks a little tougher to remove, for example at least one of them looks like it goes between the firewall and the engine, I cant imagine how I am going to get back there to get that off....
here is a picture, of the EGR, you can see the two mounting holes, and at the top where the rubber hose connects, and sticking out to the right where the large pipe connects, and finally what I am asking about, the hole where there is another smaller pipe.
erg picture
Also, I get the impression that removing the EGR and cleaning it is possibly only part of the job, and that I should be cleaning the metal pipes. Those looks a little tougher to remove, for example at least one of them looks like it goes between the firewall and the engine, I cant imagine how I am going to get back there to get that off....
05-29-2007, 05:31 PM
#32
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For the life of me, I cannot get to the PhotoBucket album that is mentioned in ALL the freaking EGR threads. Is that me did the person lock down the album? It keeps on asking me to log on.
06-10-2007, 07:14 AM
#34
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Join Date: Aug 2002
Posts: 11
Sounbwoy is completely correct. Most times it is the pipe leading to the intake that causes the problem. Just did mine recently, and was surprised to find the pipe completely clogged. Loosened as much as I could with a coat hanger, soaked the tube in cleaner for about an hour, then flushed with spray cleaner. 2000 miles later and CEL is still gone.
Removed as much hardware as I could to get to it, including intake manifold, which had all kinds of crud around the opening where the EGR pipe connected.
Removed as much hardware as I could to get to it, including intake manifold, which had all kinds of crud around the opening where the EGR pipe connected.
06-10-2007, 07:39 AM
#35
gkush could i get a shot of where that tube is? the link on the first page doesn't work.. and i have the 0302 code too.. i'd like to clean that egr tube but can't find the egr valve
06-11-2007, 06:07 AM
#36
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Join Date: Aug 2002
Posts: 11
It's toward the back of the driver's side engine compartment, beneath the TB, and above the starter. I removed the intake manifold, TB, and just about everything around it to get to it - bolts were a ##### to take out. Wish I could post a photo, but I didn't take any. I'll look around to see if I can find any kind of link to help you out.
06-11-2007, 09:35 AM
#37
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Join Date: Apr 2005
Posts: 821
there is a guide courtesy of 2da_mizzaX which helped me out alot when mine was clogged, PM me with an email and I will forward it to you (I dunno why admins don't put it in the stickies it's the most straightforward guide i've ever read)
06-18-2007, 05:24 PM
#38
Junior Member
Join Date: May 2007
Posts: 19
I changed my EGR valve and EGR Tube and cleaned the block ports. But still get a code of P0400 next I will try the EGR solenoid valve..If I still get the PO400 code what will be my next step ? Change the little hose going to the EGR valve ? Has anyone had to change the sencer in the EGR tube ?
06-19-2007, 10:59 AM
#40
Originally Posted by SSzretter
can someone verify for 100% sure what size the big nut is for the big tube coming out the bottom right side of the egr? I have read in here both 20mm and 23mm and I want to be sure before I go buy a wench...