EGR Systems

No pictures but lots of excellent information in the "Related Questions" below.

For pictures and illustrations, Autozone.com has a FREE online repair guide produced by Chiltons. NOTE: Autozone now requires free registration to access the repair guides. More than worth the extra effort for these photo/illustrated instructions.

You can get some general information about a common SES code and see pictures of where the EGR valve is located on a 2001 Grand Am at the follwing address: http://www.gaownersclub.com/forum/showthread.php?t=84396 I am sure these are accurate as they are photos from my own 2001 Grand Am.

EGR shouldn't be opening while accelerating. When was the last time you had a tune-up? You know, like Spark-Plugs, Wires, Air Filter, Fuel Filter, Clean Fuel Injectors etc... Sounds like you need a tune-up!

hard to start loss of power rough ideling real bad fuel econemy; it may stall when you stop at stop lights or stop signs etc. or slow down to turn corners

The EGR valve on a 2.5L 2005 pacifica is located behind the engine on the right hand side. shouold be same on '04
It is on the driver side rear of the engine.

Underside of the trunk! 4 11mm bolts hold protective cover.

You don't, It is totally controlled by the PCM using the IAC valve.

As far as I know it is a square "box-like part" in the upper right center under your hood behind and above the engine block As far as I know it is a square "box-like part" in the upper right center under your hood behind and above the engine block

The question is,"How do you check an Exhaust Gas Recirculation Valve?" What I would do first (And am currently doing on a 1993 Ford Taurus 3 litre V-6)is pull the vacuum tube from the EGR valve, blip the throttle or have someone place the car in gear and accelerate LIGHTLY WITH FOOT FIRMLY ON BRAKE AND PARKING BRAKE APPLIED and see if you can feel vacuum pull in the tube. If no, like the Taurus, the EGR control valve or motor, which is usually electric, may be defective. Another step would be to connect a length of vacuum hose to the disconnected EGR valve, then have that someone accelerate like before, but this time, and for lack of a better word, suck lightly on the hose; the engine should start to run slightly roughly or the pinging will stop...or, if the diaphragm is defective you will not be able to pull vacuum; that is, it will be like sucking air through a straw. Third, if the EGR valve is stuck, you will have vacuum when you pull on the hose, but nothing happens with the engine. Hope this has helped. Kevin NC

This is from AutoZone: "On your 1997 GMC TRUCK SAFARI VAN 2WD, the EGR VALVE is UNDER HOOD, CENTER, UPPER ENGINE AREA, FRONT OF INTAKE MANIFOLD, PASSENGER SIDE OF WATER OUTLET, MOUNTED IN INTAKE MANIFOLD."

First, lets talk a little bit a bout what does an EGR system do. The EGR valve either electric or mechanic is a component part of the emission system. It was designed to let back into the running engine a very small portion of burnt gases in order to decrese the posibilities of Nitrus Oxide formation (NOX). The PCM sends a signal to the EGR valve to open it over 1500RPM so the engine wont feel the burnt gas and fail. If the gas enters the engine below 1500RPM, the engine will fail and hesitate because a small portion or burnt gases will enter the intake manifold and contaminate the air/fuel mixture and a very nasty smell will come out of the exaust pipe do to impropper combustion. Also, the manifold absolute preasure will be nearly the same as that of the ambient and would probbaly make the engine to stall. If the EGR is stuck closed, no symptoms would be felt as from the engine funtionability perspective but if we talk about an electric EGR valve, the CHECK light will turn on and the PCM will create a DTC.

Hope this helps.

Good luck

EGR valve is in engine compartment, next to firewall, slightly left of centerline when looking at the engine from the front (bumper).

EGR VALVE SITS BEHIND THE ENGINE, BOLTED TO A Y PIPE WHICH IN TURN IS BOLTED TO THE BACK OF THE INTAKE PLENUM (ON THE TOP OF THE ENGINE)

under the intake manifold, between the motor and firewall. its easier to get to when your under your car

I'm thinking your car was in a wreck and it may be shredded right? You can see the main harness if you look for it from the the fuse boxes to everywhere else it goes and the branches on it are like a tree. It is usually taped up and wrapped in black. Testing is easier than replacing if it is not destroyed. You need an electrical diagram and learn where the components are located that the wiring goes to. And learn where that circuit goes to the next terminal point or fuse point. You check it point to point with a volt meter if voltage is applied or an ohm meter if you're looking for a completed circuit which is basically a short. Most electrical failures are not because "it's got a short in it" - but because a connection has broken loose in some way and somewhere.

The main two refrigeration giants are Thermo King and Carrier

Safety Bulletin

home.comcast.net/~em-engineering/T2T013.pdf

Web Link

http://autorepair.about.com/library/faqs/bl053c.htm

*Do a Google search foran Accord forum then search the posts for that. You'll come across one in which someone else asked that same question and most likely they would have received a step by step answer.

Go to the Internet and look for Eric the car guy. LOOK AT THE VIDEOS.

he demonstrate how to do it.

on a 4.0 it should be under the exhaust manifold

turn the idle screw!

On drivers side under the back of intake manifold. Big black rubber hose goes under manifold. hard to see but can be found.

Open bonnet its on righthand side of block

I am no mechanic, but I have a 1999 Nissan Maxima and I recently did some work on my EGR valve. When you pop open the hood, look at the side of the engine on your right (driver's side). Underneath all the air intake stuff that connects to your air filter is the EGR valve. Mine has a grey plastic top with an electrical connector attached to it (this top is about an inch and a half to two inches in diameter), a middle section below this that is made from a silvery metal with two rubber hoses plugged into it, and below this a bottom section with a metal pipe maybe three quarters of an inch in diameter connected to it. The metal pipe curves around and goes back behind the engine. There are two bolts that the valve is mounted on. To remove the valve, first you have to get a bunch of hoses and stuff out of the way to expose it, then disconnect the hoses and electrical connector from the valve, then disconnect the metal pipe connected to the base, then remove the two nuts on the two bolts. There is a gasket between the EGR valve and the engine which you will have to replace. It cost me less than two dollars. This also worked on my 1996 Maxima which means it's good for earlier and likely newer Maxima's.

completely correct. along with 1 plug though. I believe it is directly under the throttle body. Held it by a couple 10 or 12mm bolts. Make sure to replace the gasket. on the exhaust manifold

Looking at the engine from the front/top it is in the center between the firewall and the rear of the engine near the throttle input. actually very east to replace. On coupe, it is NOT easy to replace. The entire intake manifold must be removed to gain access.