EGR VALVE IS #2.
Please wait for second post to answer your second question....comes with a few pictures.
Testimonial: "thanks c17hydro ...looks like the proper proceedure,,,will try fix tomorrow"
Remove the vacuum hose from the EGR valve
On the 4.6L engine, remove the nut and the brake booster bracket from the EGR mounting stud
Using a suitable size wrench, loosen the EGR valve-to-exhaust manifold tube and ... 
... remove the tub from the EGR valve
Remove the EGR valve mounting bolts and ... 
... remove the EGR valve from the intake manifold
Remove the EGR valve gasket and ...
... thoroughly clean the EGR valve mounting surface
Disconnect the negative battery cable.
Remove the vacuum hose from the EGR valve.
On the 4.6L engine, remove the nut and the brake booster bracket.
Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve.
Remove the EGR valve mounting bolts, then separate the valve from the intake manifold.
Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold.
To install:
Install the EGR valve, along with a new gasket, on the intake manifold, then install and tighten the mounting bolts.
Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 25-35 ft. lbs. (34-47 Nm).
Connect the vacuum hose to the EGR valve.
On the 4.6L engine install the brake booster bracket and the retaining nut.
Connect the negative battery cable.
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Standing in front of car, on top of intake magafold, towards back of intake on top. Remove connector and 2 small bolts holding EGR valve, remove EGR valve and replace.
SOURCE: 2005 Dodge 1500 code p0404 EGR valve.
The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,
INSTALLATION
SOURCE: where is the location of the egr valve on the 4.7 liter engine
ha ha thats a fun one.. look on the drivers side of engine next to the firewall, behind the throttle body.
SOURCE: Location of EGR Valve
Found the info!!
This Dodge EGR valve is a certain kind of device that is mounted right on your intake manifold which controls the amount of exhaust gasses back into your engine.
On a 2005 Dakota with 4.7 liter engine (non-HO), the EGR valve is located near the intake manifold on the driver's side right up against the firewall. It's hard to spot as it sits lower than the intake manifold.
To change it, remove the electrical connector. There's a red tab that needs to be pushed to one side and then you have to squeeze down on a tab to get it free. Using a 13 mm socket, remove the bolt that you can see. I had to use a 3 inch wobble extention and then a 8 inch extension with a deep well socket to reach it with my 3/8 inch ratchet.
There's a second bolt that you can't see between the EGR valve and the firewall. With a little trial and error and a lot more luck, you can reach the hidden bolt with the 3 inch wobble extension and a 13 mm deep well socket. Attach the ratchet after the socket is on and remove. This one isn't easy and if there's any Dodge engineers reading this one, a couple of extra inches of clearance between the valve and the firewall wouldn't have killed you no matter what the cost accountants said.
With both bolts removed, you should be able to pull out the metal pipe that connects the manifold to the EGR valve out of the manifold (Pull to the right) and then you can lift the valve out.
For assembly, the metal pipe connecting the intake manifold the EGR valve has to be removed and reinstalled on the new valve. It's held on with 2 5/16th" bolts. You should put the rear bolt on tight, but leave the front bold loose for the reinstall as some adjustment is necessary to get it put back together and the rear is a pain to tighten when installed.
Line up the bolts that attach the valve and get the rear 13 mm bolt (The one you couldn't see on disassembly) started. Do not start the other 13 mm bolt as you'll need to pivot the valve and pipe to the left in order to reinsert the pipe into the intake manifold. Once the pipe is in the intake manifold. Start the other 13 mm bolt and tighten both 13 mm bolts and then the 5/16" bolts holding the pipe onto the valve. Reinstall the electrical connection.
Please don't forget to rate!!!!
SOURCE: EGR Valve needs cleaning or replacing
The link below is a diagram of the EGR valve. Looks like a mushroom with vacuum lines attached.
http://www.chiltonlibrary.com/content/images/8666/images/86664018.gif
Instructions:
I hope this answers your question. Best of luck.
Greg
SOURCE: need to know where the egr valve is located on a
It is located on the intake manifold behind the throttle body
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