EGR Valve

**squirrel** · December 17, 2009, 10:16 AM

Re: EGR Valve

How much diagnosing have you done...sounds like you just plugged in a code reader and found a trouble code for the EGR valve?

Do you have any idea what an EGR valve does?

if not, read up on it

**Eagle Kammback** · December 17, 2009, 10:35 AM

Re: EGR Valve

I know what it does. Recycles the unburned gasoline fumes in the exhaust

I guess I answered my last question then, it will improve gas mileage

**TheSilverBuick** · December 17, 2009, 10:39 AM

Re: EGR Valve

Duralast IS a good brand from my experience working at the Zone.

As Squirrel said, if you are just seeing an EGR code off a reader there is much more to diagnosics than reading the code. What the code says is not usually the problem, it's the symptom. Use it as a guide not the answer.

That being said, you can pull the EGR off and spray it down with some carb cleaner and bolt it back on and it may fix a sticky EGR. Could be a broken wire as well.

**Eagle Kammback** · December 17, 2009, 10:41 AM

Re: EGR Valve

I wasn't here when they tested it, my brother's gf's dad has been working on cars his whole life, said it doesn't work at all, at least that is what he told my dad, who told me

I figure fixing this will be a good Christmas gift for my brother and my dad

**squirrel** · December 17, 2009, 10:46 AM

Re: EGR Valve

Replacing the EGR valve may or may not affect mileage, hard to say. It's purpose is not to recycle exhaust gas, it's purpose it so add some inert gas to reduce combustion temperature. This might let it run more timing advance at part throttle, which might improve mileage. My guess is you're gonna get pretty bad mileage out of a 3/4 ton 4x4 no matter what you do.

To find out where the part is made, you could ask for one and look at the part and box and see what it says. Good luck.

**Eagle Kammback** · December 17, 2009, 10:48 AM

Re: EGR Valve

Actually, a half ton 2x4.

Truck gets less than 10MPG

**squirrel** · December 17, 2009, 10:50 AM

Re: EGR Valve

Put a piece of black electrical tape over the light, sell the truck, buy a chevy. My wife's 99 with a 325ci engine gets 20 mpg.

**TheSilverBuick** · December 17, 2009, 10:50 AM

Re: EGR Valve

I've met plenty of guys, and worse shops, that worked on cars all the time will little or no clue on actually how to fix problems outside routine maintence. It's scary.

And a properly working EGR shouldn't really effect mileage. And as Squirrel mentions could possibly improve it. I've talked with Milner351 about that in my quest for mpgs.

**Eagle Kammback** · December 17, 2009, 10:52 AM

Re: EGR Valve

No, We love the Ford truck, other than gas mileage, never really had many major problems

**STINEY** · December 17, 2009, 10:58 AM

Re: EGR Valve

Originally posted by Eagle Kammback

I've never done it, but the check engine light has been on for a while, my brother's gfs dad used a tester on it to find out what was wrong.
Will the gas mileage get better when I replace this? We get crap mileage right now

This is one of the things I fixed to get rid of all of my codes in my '89 E350 OBDI 351 van.

Once it was in good operating condition (I have since towed 4000# 800 miles with it, carrying my wife & kids) I decided to do a little experimenting with fuel mileage.

Unhooking the EGR made no measureable difference. Leaving it functional certainly didn't hurt mileage. So I left it functional, after all, the new one cost me the better part of $100.

You can just leave the vacuum line unplugged to disable it. The computer will store a code, but that should not trigger the CEL if I remember correctly.

I bet you the O2 sensor is bad. That was the final piece I needed to replace to get mine back to good running order.

You also do NOT need a code reader to get the codes from a OBDI. The computer has a self diagnostic mode, it only takes a 4" piece of wire to retrieve the codes. A paperclip will do the trick, then grab a pen & paper and count the blinks of the CEL light.

Here is a site with the codes. http://www.my5oh.com/forum/viewtopic.php?t=197

And here is the plug to jumper to retrieve the codes.

http://www.my5oh.com/forum/viewtopic.php?t=190

My plug is red and is on the passenger fenderwell next to the battery. I believe the trucks had them close to the driver side hood hinge. They are all shaped the same and the ports needed to jumper are the same too.

**STINEY** · December 17, 2009, 11:03 AM

Re: EGR Valve

Forgot to add, be ready for broken studs when removing the EGR sensor on top of the valve itself. They are just little dinky things and I guarantee at least one will break.

Personally, I wouldn't bother. Wish I had my almost $100 back, but I wanted mine to be reliable and not leave us stranded. I used the van to teach myself some FuelInjection stuff (I'm a carburator caveman) and I gained a good working knowledge of the system and a trustworthy vehicle at the same time, so I'm happy.

But I will never replace an EGR on that vintage Ford again. I found no difference in mileage.

**TheSilverBuick** · December 17, 2009, 11:05 AM

Re: EGR Valve

Funny you mention that Stiney. When I get around to regularly driving my Centurion again (it's the only car I have with an EGR), I intend on hooking a vacuum switch up to turn the egr on or off with a toggle switch, and test mpg accordingly by controlling it on my terms. Relative to engine size I don't expect it to be enough to see a measurable gain. I would like to try it on an EFI's 6 cylinder though.

**urwurznitmahre** · December 17, 2009, 11:05 AM

Re: EGR Valve

toad it's more than like the egr solenoid.
not the egr..
the egr fail'n you'd know it. as the truck wouldn't idle and it stall althe time.. (if stuck open)

**min301** · December 17, 2009, 11:07 AM

Re: EGR Valve

So why are you replacing the EGR?

More than likely, issues with the EGR are associated with
the DPFE, and one of the solenoids.

EGR Valve

EGR Valve

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment