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yvrdakota
Dodge Dakota
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11/25/2008
21:06:39

Subject: where is the EGR valve
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i have 99 dodge dakota 3.9L 4WD

im having the same problem as other people with the misfiring
when truck cold etc.

im trying to find where the EGR valve is located...Haynes/Chilton
manuals dont say anything about it

is this something a regular person can change?






AKNick
Mechanic
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11/26/2008
04:28:18

RE: where is the EGR valve
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On my '94 3.9L 4WD it is located just aft (towards the trucks rear) of your air filter/ throttle body a bit to the left (if you're facing the front). If that doesn't help, you may follow a 5/8"? tube coming from your exhaust header that leads into the port where your EGR valve hooks up to.

This is a very easy task (usually 3/8" socket with an extension on a ratchet works good), the only thing you may need to worry about (besides coughing up $60-$100) is cleaning the port where the EGR valve hooks up to.

If it looks Really nasty and coaked inside you should try cleaning it out or else you may fry your new EGR valve and waste your money.

I like to get some Q-Tips, dip them in a little acetone (or like cleaner) and just brush the inside to get all the carbon out, then later get a shop-vac and suck all the residual carbon that may have fell in the cavity. (some people like to reattach the old EGR valve, fire up the engine, shut it down, detach the old EGR valve, and install the new EGR valve - do this if the cavity looks really gross) Then just bolt the new one on (some people may say add a little RTV on the gasket, but that is just personal preference in most cases).

The Computer may have to adjust to this, so while you're in the process of replacing the EGR valve I'd recommend you disconnect the battery for at least 15min(?) and reconnect once you're done.

Well, hope I didn't overload you there with information on an easy task :) Have Fun!

AK Nick



Bob Lincoln
Dodge Dakota
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11/26/2008
08:19:33

RE: where is the EGR valve
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1996 to 2004 engines do not have an EGR valve.

Check fault codes. http://allpar.com/fix/80s-codes.html



yvrdakota
Dodge Dakota
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11/26/2008
09:57:23

RE: where is the EGR valve
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thanks, i was pulling my hair out looking for it, i have a P0301
code (misfire detected cylinder no 1) but trouble code does not
appear everytime this happens.

any updates from anyone else that had this problem of
misfire/backfiring when engine cold?

very intermittant, taken it to 2 different shops

and have change all the basics plugs/wires/dist cap/rotor

worth my money to try the tps and map sensor?

im down to throwing parts at the truck now



frederick
Dodge Dakota
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3/05/2023
09:11:54

RE: where is the EGR valve
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I have the problem of finding the EGR Valve on my
2006 Dakota 3.7L slt manual.I have looked at the
rear and front of the engine where suggested; but
still do not see one. I WANT TO BE CLEAR THAT IF IT
IS THAT SOME DAKOTA MODELS DO NOT CARRY IT??



Eman
Dodge Dakota
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7/15/2023
10:07:56

RE: where is the EGR valve
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I know this thread is old but this may help someone in the future. The misfire when cold might be a bad fuel pressure regulator. My 1990 3.9 ran really bad when it was cold when I first bought it. It looked like the previous owner threw a bunch of ignition parts on it to try to fix it. The fuel pressure regulator diaphragm was ruptured causing fuel to be pulled into the vacuum line and in turn causing a very rich fuel mixture. with the truck running pull the vacuum line off the fuel pressure regulator, if there is any fuel coming out of the vacuum port on the fuel pressure regulator you know you've found the problem.



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