EGR Valve Replacement
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Tuned
Joined: Mar 2011
Posts: 320
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EGR Valve Replacement
Ok, so my EGR valve was toast. Any time I hooked it up it would kill the truck. So I went and spoke with my friendly Autozoner and ordered a new EGR valve and a new Ported Vacuum Switch.The switch went in with minimal problems (a trip to Home Depot to get some brass fittings), but the EGR valve came with a slew of orifice washers. I was able to clean up my old EGR valve and get the part number off of it, which gave me the washer number I needed. Well, the problem is the way Wells wants the washer installed. "Use a hammer and center punch to make indentations around the edge of the washer to hold it in place." Yeah, doesn't work. I used a center punch, and my trusty Stanley hammer, and punched the living dog $h1t out of that sucker. When I thought it was good I picked the valve up off the bench and *ting*, the washer falls right out. So I say screw it, and sorta RTV that stupid thing in place. Does anyone see ANY possible problems I may face by having it in like this?? What a stupid setup they have for these aftermarket valves. Why can't they just spend the money on the tooling and make them the right way??
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Tuned
Joined: Mar 2011
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Too late for that, I installed it and ops checked it and so far so good. Basically, if you buy a Wells EGR valve, it is made to accommodate many different models. It comes with the valve, gasket, and a bag of washers. Based off the part number of your OEM valve, you use one of the washers. The washers go into the orifice on the EGR valve to reduce it. All of the washers have a different size hole, so you have to use the right one. It's a stupid system, but apparently if you don't want to spend $100 on an EGR valve, it's the system you're stuck with.
Tuned
Joined: Nov 2010
Posts: 426
Likes: 1
From: Caledon ON
I had to replace my valve and the one I got was the same as yours. I thought it was a stupid idea too but I managed to stake the washer in with no problem. Bolted it on and now the truck runs perfect. I guess ya gotta do what ya gotta do these days.
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Tuned
Joined: Mar 2011
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Ok, so another question. Is it common for these trucks to not want to start when it's mildly cold outside?? Since I replaced the EGR valve the temperature has dropped from 80 degrees to highs of around 60. Right now it's about 47 and I just drove the truck but she didn't want to start and is running kinda rough. I'm wondering if it's the EGR valve or if these suckers just hate life until they are warmed up. She did run slightly better by the end of my quick trip to the store, but she was running seemingly better without the EGR valve hooked up.
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MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
If the cold-running issue only appeared once you added the EGR valve, make sure that vacuum to the valve is sourced through a ported vacuum switch. The EGR valve isn't supposed to receive a signal until the engine warms up past a certain temperature.
If it's having trouble starting when it's cold (EGR valve or not), make sure the choke is closing when you press the pedal once before a cold start.
If it's having trouble starting when it's cold (EGR valve or not), make sure the choke is closing when you press the pedal once before a cold start.
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Tuned
Joined: Mar 2011
Posts: 320
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It is through a ported vacuum switch, I replaced that with the EGR valve. I'm thinking it may also be caused by the fact I don't have the stock air cleaner, and the pre-heater is non-existent. I LOVE having to reverse engineer backwoods engineering!!
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Tuned
Joined: Mar 2011
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Well, it's official: my truck HATES the EGR valve. I took her out today to get an air cleaner stud from Autozone and some odds and ends from Home Depot. On the way to Autozone she was running like crapola and bucking and kicking her way down the street. When I reached in my pocket to get my keys I felt the vacuum plugs in there, so I yanked the hose from the ported vacuum switch to the EGR valve and capped them off. She ran like a champ the rest of the trip and started easier. Must be the cheap aftermarket valve causing problems.
Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
Well, it's official: my truck HATES the EGR valve. I took her out today to get an air cleaner stud from Autozone and some odds and ends from Home Depot. On the way to Autozone she was running like crapola and bucking and kicking her way down the street. When I reached in my pocket to get my keys I felt the vacuum plugs in there, so I yanked the hose from the ported vacuum switch to the EGR valve and capped them off. She ran like a champ the rest of the trip and started easier. Must be the cheap aftermarket valve causing problems.
One of those things that was designed to help the vehicle, when all it did was complicate things.
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Tuned
Joined: Mar 2011
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Yeah, my EGR valve isn't even hooked up at the moment, and the truck runs fine without it... I've talked to FMC before about EGR stuff and it seems that it's NOT necessary to have it hooked up, but it's a good idea.
One of those things that was designed to help the vehicle, when all it did was complicate things.
One of those things that was designed to help the vehicle, when all it did was complicate things.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Posting Guru
Joined: Dec 2009
Posts: 2,134
Likes: 1
From: Mississippi
FMC, would you mind rehashing the cons of removing the EGR? My '76 still had the pump on it when I bought it though long locked up apparently and I'm considering removing the EGR and plugging the heads where the tubes went.