Way to bypass EGR valve? - Nissan Forum
Truck & SUV Armada, Frontier, Murano, Pathfinder, Quest, Titan, X-Trail, Xterra

LinkBack Thread Tools Display Modes
post #1 of 8 Old Nov 1st, 2003, 03:54 PM Thread Starter
NissanForums Newbie
Joined: Oct 2003
Location: Oregon
Posts: 6
Way to bypass EGR valve?

I've come to the conclusion that the EGR valve has gone bad....i.e. erratic idle and sputtering when trying to maintain a steady RPM. When I pulled the vacume line off the top, there was no change in this erratic condition. When I put my fingers under the diaphragm I can feel it moving in cunjunction with the rough idle. Is there a way to render this thing static? It looks like a pain in the ass to replace.


purplehayes65 is offline  
Sponsored Links
post #2 of 8 Old Nov 1st, 2003, 05:24 PM
jadcock's Avatar
Joined: Nov 2002
Location: Sandhills of NC
Posts: 1,855
Removing the vacuum line will disable it. However, the valve should be closed at idle anyway, so if your sputtering at idle is due to an EGR malfunction (and it certainly could be), it probably means the EGR valve is stuck OPEN...and this probably isn't due to the vacuum. There may be a piece of carbon or flashing stuck in the pintle of the valve, keeping it from closing fully. It does look like a complete pain to remove, but I think that is what will be necessary (for you to clean the junk out of the pintle), provided that your problem is indeed the EGR valve.

Jason Adcock
Always Tread Lightly!
1995 4x4 XE King Cab - 189,000 miles
1997 Cadillac Seville - 141,000 miles
jadcock is offline  
post #3 of 8 Old Nov 2nd, 2003, 06:23 PM
Nissan Enthusiast
Joined: Sep 2003
Location: South Central, PA
Posts: 205
Do you want to by-pass it temporarily or permanently?
96R50 is offline  
post #4 of 8 Old Nov 3rd, 2003, 10:48 AM
265k miles and counting..
himilefrontier's Avatar
Joined: Jan 2003
Location: Tampa Bay Area
Posts: 2,656
Send a message via AIM to himilefrontier
To permanently bypass it you will need to fabricate a block off plate out of at leat 1/4 in thick steel.I would just replace it with another functioning EGR Valve or try to clean the one you already have.

1998 Nissan Frontier XE/2wd/5spd 1 owner, 264k miles
1985 Olds Cutlass, 350 Chevy, owned for 14 years
WANTED: 1968-1973 Datsun 510 or 1991-1994 Sentra SE-R
himilefrontier is offline  
post #5 of 8 Old Nov 3rd, 2003, 11:22 AM
Nissan Enthusiast
Joined: Sep 2003
Location: South Central, PA
Posts: 205
I strongly urge you to diagnose the problem and if it is your EGR valve, replace it with a functioning unit. The EGR does more than re-circulate exhaust gasses for emissions. The gasses also help to lower the combustion chamber temperatures. Lower combustion chamber temperatures help to reduce spark knock and also help to keep your valves cooler so that the valves and their stem seals last longer.
96R50 is offline  
post #6 of 8 Old Nov 3rd, 2003, 06:33 PM
Nissan Addict
aaronford's Avatar
Joined: Mar 2003
Location: Morgantown, WV
Posts: 838
Yeah, and the reduced combustion chamber temps reduce the formation of NOX, which is a pollutant formed when Nitrogen (78% of our atmosphere) is reacted with oxygen (>1700 F). This is not related to Nitrous Oxide that is used to boost power.

Aaron Ford
95 2WD Nissan PU E
2002 Oldsmobile Intrigue GX
"The hard part about playing chicken is knowing when to flinch" Scott Glenn in The Hunt for Red October
aaronford is offline  
post #7 of 8 Old Nov 4th, 2003, 09:53 AM Thread Starter
NissanForums Newbie
Joined: Oct 2003
Location: Oregon
Posts: 6
I agree that it should be replaced with a working one. I was just trying to come up with a temporary fix. I'm starting to think that it may not even be the culprit. It does , however run smoother at the constant rpm's. It basically doesn't want to idle, or idles erraticly...
purplehayes65 is offline  
post #8 of 8 Old Nov 4th, 2003, 11:28 AM
Nissan Enthusiast
Joined: Sep 2003
Location: South Central, PA
Posts: 205
You may want to clean your throttle body. The PCV and EGR valves dump into the throttle body. If the idle air control valve passage is clogged or partially clogged you will have a rough and erratic idle. Be careful what you use to clean the throttle body. Harsh cleaners and stiff bristles or rough scouring pads will remove the coating from the AL. Stick with a soft cloth and some throttle body cleaner or mineral spirits.
96R50 is offline  

  Nissan Forum > Truck & SUV

Quick Reply

Register Now

In order to be able to post messages on the Nissan Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome