6.7 EGR Servo Motor Mod??

[IdleUp]

I'm not an expert in this emission thing but does anyone have any experience with the servo motor that closes and opens the ERG tube with the push/pull cable setup. It would seem to me that here is where we need to concentrate our efforts to get rid of the EGR problem it would be simple and undectable.

Can't we just jam (or unplug) the servo motor to where the butterfly stays closed, then just deal with the codes instead of doing all the ERG valve removal and plugging up the lines where the dealer can spot the modification?

Does anyone know which position it is when its closed, or have any information on the servo motor and how it functions?

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2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

[Jeb_H]

If you have the EGR closed off all the time, its going to be sucking down the exhaust from the transfer tube all the time. Not sure what your after but I think for the main part its your warranty and your dealer is your bigger worry???

To me it was a fine line, I had nothing good to say about the selling dealership and knew then I was going to ditch the warranty for a good running truck, which is what I did. Your call dude, for you and yours...

I am sure we will see a day our fearless Gov't will pursue all of us criminals down like low down dirty dogs we are for deleting all this emission stuff off our trucks, but me for one they can arrest me and throw my ar$$ in jail and feed me if thats the case... The truck was never going to live long enough to pay for itself, much less make any money with how I have to use it for a living.

They get a system that works well and doesn't consume twice the fuel to do so, then they can make us think twice about using them... At least I think so, this bringing things like this out and have us make do with this crap is a bad choice... Least for us that use the trucks to make a living with... I ain't after the smoke either LOL.

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White 07' 3500 DRW 4X4; 68RFE; 3.73's;AX flash;DPF, EGR & EGR Cooler, OEM AirIntake Horn all MIA;Cool Tube Intake w/5.9 filter;Raptor150 w/fuelrail & Liftpump guages;Remote 2 Micron Fuel Filter setup w/water seperator;CrankCase Vent Re-route; Juice w/Attitude+Hot;2" level kit;Indash Mounted Prodigy; Weathertech; B&W Rollover Hitch.5"TBE. BriteBox.Kilby's Condenser Guard.

[IdleUp]

Jeb,

I'm 100% behind you there, my problem is the truck is only 2 weeks old so I don't want to trash the warranty yet until I de-bug it. I already have a brake booster problem where the pedal won't return. Some high-tech monkey told me the exhaust brake might be stuck I didn't have the nerve to tell the jerk the exhaust brake wouldn't know what a service brake was.

As a rule, unless it is something major, I never bring my truck in for repair - I hate those factory trained idiots who always know whats best for me and my truck. Since they know everything if you suggest something they will fix something else so you don't prove them wrong.

My truck in on probation right now as soon as my first turbo goes out I'm bringing it in for a new one and not some moron drilling a hole to squirt some crap to cover the problem and I'm driving the truck straight home removing the ERG and the DPF and screw cummins and dodge I'll take my chances. Some of these engines can run for a million mile I'm not worried about warranty.

What about the butterfly valve that's hooked to the servo motor - does anyone have an exploded view of the EGR system?

__________________
2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

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Last edited by IdleUp : 06-26-2008 at 07:40 PM.

[Compcowboy]

just unplugging that servo will cause a code that will not clear. I doubt you can just jam it. So far i have not pulled it apart because of the code issue. we are working on that ATM.

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??? Hp ???? Tq - 2007 6.7 TWIN TURBO 2500 Bighorn 4x4 6-spd Manual, Airdog 150, ARP Head Studs, Bullydog PMT, TS MP-8, Airbags with Dual Control Air Comp., H&S Delete & Downpipe, What EGR?, Valair Dual Disk, Amsoil Bmk-11 Bypass, 295/70/R17 Toyos on Walker Evans Wheels,6" Aussies & Hushpower Muffler & DiProcol Gauges & 120HP nozzles (on the way) Thanks to Wally At FTEDiesel!!!!!

[IdleUp]

I'm just thinking from a stand point that if we can somehow jimmy the servo butterfly that would keep the exhaust out of the system then visual wise, when some dealer pops the hood everything looks normal & stock.

On the other hand, if you remove the ERG valve and crossover pipe and plug the thing, you got 2-3 hours to put the stuff back on should you need to visit the dealer.

The code is no big deal - if you bring it in with the servo hooked back up, and everything looking normal - the monkey just figures it's but another computer problem and clears the memory and your good to go until your next visit at the hospital. Your not liable to lose your warranty because nothing has been altered (that they can see).

After spending 2 days gazzing at this damn engine, this is the only way there might be a possibility to beat the system.

Keep the exhaust gas out of the intake and things clean up and the mileage comes back.

__________________
2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

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Last edited by IdleUp : 06-26-2008 at 08:09 PM.

[IdleUp]

Originally Posted by Compcowboy

just unplugging that servo will cause a code that will not clear. I doubt you can just jam it. So far i have not pulled it apart because of the code issue. we are working on that ATM.

Hey Cowboy was it your thread that showed how to remove the the EGR valve.

The question is; if I were to unplug the ERG valve would the valve remain closed to prevent the exhaust from entering the intake?

If so I'll just unplug it and big deal when I visit the dealer it has a code and he resets it - no big deal and nothing is changed on the engine.

__________________
2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

[Garry Verheyden]

I don't think what you want to do will work.
I wanted to keep my truck looking stock at first too. I made a blockoff plate at both sides of my EGR tube on the front of the engine, just to stop the exhaust gasses from entering the engine as you said. The engine was surging like crazy and sounded and accelerated like crap!!
You blocking the servo shut would have the same effect as blocking it 3" further down the line at where the EGR tube connects.
I had to take the 3-1/2" flapper valve out of the intake side and block the plates where the intake valve used to sit.
I think if you want it to look stock, you should do the instructions like Comp Cowboy showed us. But then you should make some really thin blockoff plates and remount the valve that sits on top of the intake. Then I would weld a solid plate inside the EGR tube that goes infront of the engine. That would keep it looking stock and still running good without any operational EGR.
You'd still have the CEL come on though. No big deal!

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08 Mega Long Dually Laramie loaded, electric blue, 68rfe, edge att., 5" side pipes, Airdog 150,DPF & EGR gone!! ,

[IdleUp]

Originally Posted by Garry Verheyden

I don't think what you want to do will work.
I wanted to keep my truck looking stock at first too. I made a blockoff plate at both sides of my EGR tube on the front of the engine, just to stop the exhaust gasses from entering the engine as you said. The engine was surging like crazy and sounded and accelerated like crap!!
You blocking the servo shut would have the same effect as blocking it 3" further down the line at where the EGR tube connects.
I had to take the 3-1/2" flapper valve out of the intake side and block the plates where the intake valve used to sit.
I think if you want it to look stock, you should do the instructions like Comp Cowboy showed us. But then you should make some really thin blockoff plates and remount the valve that sits on top of the intake. Then I would weld a solid plate inside the EGR tube that goes infront of the engine. That would keep it looking stock and still running good without any operational EGR.
You'd still have the CEL come on though. No big deal!

Garry,

Thanks for the reply - I'm not sure I understand what the difference is (surging) the way you tried it, verses by doing it with the block plates like the other user did. Why would that differ from just having the valve closed either on the EGR valve or the Servo.

Does anyone know the position of the EGR valve in it's unplugged position or the position of the servo valve in it's unplugged position?

Thanks

__________________
2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

[Garry Verheyden]

I think the surging would be because the 3-1/2" flapper valve on the intake side is slamming open and closed, trying to let some of the egr gasses in, but the computer doesn't know that the egr is blocked. So instead of the intake valve closing the air intake, letting the exhaust gasses get into the engine, it is closing, letting nothing into the engine. This would cause surging, or bucking.
I imagine a certain amount of backpressure from the egr going into the intake will balance the big flapper valve in the intake. Thats the only thing I can think of that would cause this.

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08 Mega Long Dually Laramie loaded, electric blue, 68rfe, edge att., 5" side pipes, Airdog 150,DPF & EGR gone!! ,

[Garry Verheyden]

I also wanted to say, removing the flapper valve in the intake fixed all the bucking/surging problems.
If you removed the flapper valve in the intake, your system might work. But the egr valve you are closing better have a real good seal on it. Otherwise under heavy boost, you'll be forcing air into the exhaust manifold. I don't know if the the valve on the egr servo would seal good enough at 30+ pounds of boost.
Welding the inside of the egr tube shut on the otherhand, would be airtight.

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08 Mega Long Dually Laramie loaded, electric blue, 68rfe, edge att., 5" side pipes, Airdog 150,DPF & EGR gone!! ,

[IdleUp]

Just wondering who it was that removed the EGR valve and if I can find someone, I'd like to find out if the EGR valve is in a normally closed or open position when the unit is unplugged.

Would seem to me the EGR valve has the capability to shut off the exhaust flow completely to the intake. If this is the case it would seem logical that we could just unplug the valve and live with the warning code or light and clean up the system.

Thanks

__________________
2008 3500 Resistol 6.7 Bone Stock
www.bigpickup.com
www.rotory.com

[Garry Verheyden]

If you're talking about the valve on the exhaust side. You have to remember, when you unplug the valve, you'd have to unplug the valve on the intake side as well so it wont flutter trying to let the exhaust gasses in. I don't know what will happen if you unplug the valve on the intake side. Maybe someone else will chime in that has done it.
So far, all the guys doing the egr delete are leaving the large valve on the intake and the valve on the exhaust plugged in. They're just taking the valve out on the inside so it's not operational.

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08 Mega Long Dually Laramie loaded, electric blue, 68rfe, edge att., 5" side pipes, Airdog 150,DPF & EGR gone!! ,