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  #1  
Old 01-15-2013, 12:36 PM
4Banger5speed 4Banger5speed is offline
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Default BlockingOff/Disable your EGR

This is a suggestion that I found on www.hotrodhigh.ca/2300 This site has a bunch of cool mods and explanations with pics its worth a check out. It is NOT my write up. But I did do this mod and am totally satisfied with it. It is easily reversable if you have to have your truck smogged. I live in Florida you can drive any piece of crap you can get on the road with no fear of being inspected by anyone. Just thought Id share for those interested.
Originally, I suggested blocking off the EGR valve to improve power and increase gas mileage then I changed my mind and enabled it. Well, after about 3/4 of a tank of gas - it's disabled again. It just hurts performance and all around driveability too much to enable it! Disabled, it provides about a 5% increase in both hp and gas mileage from what I can tell. The engine runs better and has better acceleration without the egr.

The EGR (exhaust gas recirculation) valve's job is to introduce exhaust back into the intake manifold to reduce emissions at the expense of power and gas mileage. The previous link does a good job of describing its operation.

This seems to be utterly stupid especially because exhaust gases are added after the fuel/air mixture is determined. It seems to be defeating the purpose of a proper air/fuel mixture!

Now, my goal is to increase fuel efficiency so that I use less gas - consequently reducing the pollution to the atomosphere. So far with all the mods (including this one), I've increased my highway mileage dramatically and increased the engine's power!

The EGR valve is located at the back of the throttle body. It has a pipe that runs from the exhaust manifold over the head next to the firewall to the EGR valve. Ideally, you would like to disconnect and block off that pipe but you'll find that it is seized and rusted in place. A big nightmare to get it off. The alternative is to block off the EGR to throttle body passage - that's a lot easier. Just takes an easily made blocking plate made out of a piece of sheetmetal you have lying around.
The exhaust pipe from manifold to EGR valve
Gasket on top, sheet metal blocking plate on bottom

There's two bolts (10 mm head) that hold the EGR valve onto the throttle body. The top bolt is easy to get to but the bottom is very awkward. Disconnect the throttle body position connector from the driver's side of the EGR valve to give yourself room. I used a box end 10 mm wrench to unscrew the bottom bolt.
Undo two bolts and slip in new gasket and blocking plate

I purchased a new EGR valve gasket for $4.00 and used it as a template for making a blocking plate. Put the new gasket against the throttle body and the blocking plate on the EGR side. Bolted it all together. Took less than an hour! The engine runs quieter and smoother. I have a little more power and will find out if the gas mileage improves with the next tank of gas.


You can't remove the EGR components otherwise the ECU will think something has failed - we are fooling the EGR system here.
It's pretty much impossible to remove the pipe from the exhaust manifold to the EGR valve - it will be rusted solid in the exhaust manifold
After every modification that affects the fuel/air mixture like this one - you must reset the ECU by removing the negative terminal of the battery. Wait 5 min, reconnect and then over the next 15 miles of driving (idling won't work!), the ECU will relearn the new air/fuel mapping.
You don't have to turn the key to the on position when resetting the ECU. Just disconnect the negative terminal as outline previously
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Old 01-15-2013, 12:47 PM
06RangerXLT 06RangerXLT is offline
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Default Re: BlockingOff/Disable your EGR

you realize the purpose of the EGR is to reduce emissions by sending exhaust gas with unburned fuel back into the intake. yes it dirty's the intake and kills the motor, but taking it off normally leads to worse MPG. its also highly illegal.
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Old 01-15-2013, 01:05 PM
4Banger5speed 4Banger5speed is offline
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Default Re: BlockingOff/Disable your EGR

So is the 8 plugs in the 4 cylinder. (to reduce emissions) But most on here have done the coil mod. Getting rid of your CAT converter...and going above the posted speed limit are also Illegal. And I am totally FOR obeying all laws. I can only go by my experience. And I got 2 more MPG. Tried it with and without. By all means do what makes you comfortable. The hotrodhigh site does pertain to racing but it has a lot of good information that has helped me. Your experience my differ. Thanks for your input.
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Red 1994 Mazda B2300 Base Model With A/C--2.3L--140cid-100hp--4Cyl--D.I.S. Engine Code [A]--Bosch (4505) Fusion Iradium Spark Plugs-- "Cheap" 8mm Silicone Plug Wires--Gatorback Belt--Blocked Off/Disabled EGR Valve--Coil Mod--Throttle Cable Mod--Magnaflow Muffler/No CAT--5 Speed M5R1-RWD--3.45 Non Limited Slip Rear End---Lowered 5" Rear 3 1/2" Front---269,000 Miles as of 11/1/2013---If its a Ford you will need to keep a lot of tools and a good fire extinguisher handy.
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Old 01-15-2013, 01:26 PM
FireRanger FireRanger is offline
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Default Re: BlockingOff/Disable your EGR

What this write up completely leaves out is temperature and design.

Yes the EGR is after the MAF, introducing unmetered air. But it is also introducing unmetered unburt fuel, reducing it's effect. The computer constantly adjusts the fuel volume based on feedback from it's sensors. The EGR is not throwing anything off. Engineers are not that stupid to have not figured that out 30 years ago. If you think you're fixing something they overlooked, you're not.

The EGR air and fuel reduces the combustion temperatures. The engine and computer are designed around this actually taking place. Blocking off the EGR and tricking the computer into thinking it is there will result in increased combustion temperatures, increasing cylinder head temperatures. The result could be nothing. Or it could be burnt valves and heads. Once again, the engineers that designed this are not retards.
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  #5  
Old 01-15-2013, 01:33 PM
modelageek modelageek is offline
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I live in the peoples republic of Massachusetts. I would never get a sticker on my vehicles if I removed the EGR. .......

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  #6  
Old 01-15-2013, 01:43 PM
HazardousRanger HazardousRanger is offline
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Quote:
Originally Posted by modelageek View Post
I live in the peoples republic of Massachusetts. I would never get a sticker on my vehicles if I removed the EGR. .......

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A meaningless post

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  #7  
Old 01-15-2013, 01:45 PM
modelageek modelageek is offline
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Quote:
Originally Posted by HazardousRanger View Post
A meaningless post

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Educate me. Why is it meaningless?

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2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #8  
Old 01-15-2013, 05:16 PM
4Banger5speed 4Banger5speed is offline
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Default Re: BlockingOff/Disable your EGR

Quote:
Originally Posted by modelageek View Post
I live in the peoples republic of Massachusetts. I would never get a sticker on my vehicles if I removed the EGR. .......

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Your not "removing the EGR" your simply blocking it off with a piece of sheet metal. It can be removed and reinstalled (or not) at will. In about 15 mins tops. As far as "fixing something" Its not meant to be a "fix". Its a very simple proven modification that WORKS!... And the "Engineers that design for FORD not being retards".....Thats YOUR oppinion not mine! Lol Tell that to all the people that due to faulty brake pressure switches on their F150s leaking brake fluid on the exhaust manifolds and their trucks... sometimes garages and entire house burnt to the ground!!!
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  #9  
Old 01-15-2013, 05:21 PM
FireRanger FireRanger is offline
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Comparing a faulty part to a proven engineered system in use on every gas automobile for the last 30 Years is not a valid or meaningful comparison. If you have some meaningful evidence that shows the EGR system is flawed due to poor design, by all means, post it. But I already know you don't.

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  #10  
Old 01-15-2013, 05:30 PM
4Banger5speed 4Banger5speed is offline
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Default Re: BlockingOff/Disable your EGR

Exhaust gas recurculation is not used in racing. All I know is I get 2 more MPG with the mod....Ive tried it both ways 3 or 4 times now. I have 262,700 miles on my truck with the stock head and valve train. Ill let you know when I burn either of them up. This modification is staying on my truck till the bitter end. Good post though and your entitled to you oppinion....but....so am I. Hap Hap Happy Truckin!
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  #11  
Old 01-15-2013, 05:44 PM
02RangerFX4 02RangerFX4 is offline
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Quote:
Originally Posted by 06RangerXLT View Post
you realize the purpose of the EGR is to reduce emissions by sending exhaust gas with unburned fuel back into the intake. yes it dirty's the intake and kills the motor, but taking it off normally leads to worse MPG. its also highly illegal.
This^ and it also makes your engine run too lean. The computer is programmed to read EGR flow, and makes up for the exhaust gasses put in.

----------

Quote:
Originally Posted by 4Banger5speed View Post
Exhaust gas recurculation is not used in racing. All I know is I get 2 more MPG with the mod....Ive tried it both ways 3 or 4 times now. I have 262,700 miles on my truck with the stock head and valve train. Ill let you know when I burn either of them up. This modification is staying on my truck till the bitter end. Good post though and your entitled to you oppinion....but....so am I. Hap Hap Happy Truckin!
The reason racecars don't use emissions systems is because the EPA doesn't regulate race car emissions. I don't even think racecars have a computer. That being said, the computer makes up for the EGR gasses. If it didn't your truck would run like shit all the time.
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  #12  
Old 01-15-2013, 05:48 PM
stateranger stateranger is offline
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Default Re: BlockingOff/Disable your EGR

If you block the egr how will you bypass the dpfe sensor that will throw a cel code.
That is if your truck has a dpfe.
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  #13  
Old 01-15-2013, 06:45 PM
FireRanger FireRanger is offline
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Default Re: BlockingOff/Disable your EGR

Quote:
Originally Posted by stateranger View Post
If you block the egr how will you bypass the dpfe sensor that will throw a cel code.
That is if your truck has a dpfe.
Example #3 of why this write up is not very useful or complete.
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  #14  
Old 01-15-2013, 07:05 PM
Rangerman49 Rangerman49 is offline
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Default Re: BlockingOff/Disable your EGR

Quote:
Originally Posted by FireRanger View Post
What this write up completely leaves out is temperature and design.

Yes the EGR is after the MAF, introducing unmetered air. But it is also introducing unmetered unburt fuel, reducing it's effect. The computer constantly adjusts the fuel volume based on feedback from it's sensors. The EGR is not throwing anything off. Engineers are not that stupid to have not figured that out 30 years ago. If you think you're fixing something they overlooked, you're not.

The EGR air and fuel reduces the combustion temperatures. The engine and computer are designed around this actually taking place. Blocking off the EGR and tricking the computer into thinking it is there will result in increased combustion temperatures, increasing cylinder head temperatures. The result could be nothing. Or it could be burnt valves and heads. Once again, the engineers that designed this are not retards.

This DEAD on, couldn't have said it better!!!!
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  #15  
Old 01-15-2013, 08:30 PM
4Banger5speed 4Banger5speed is offline
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Default Re: BlockingOff/Disable your EGR

Yes the computer is programmed to read EGR flow and the exhaust gasses put in...or NOT put in it and adjust for it accordingly. Yes most race cars DO have EEC and ICM units. Usually 2 so you can switch from one to the other If they fail. You guys do what you want with your trucks. I'll do what I want with mine. Its NOT a write up. Its a suggestion. Im sharing information from another site. Im not trying to talk you into anything. Ignore it if you want. But please dont knock it based on principle and no experience with it. The coil mod which also works...but there are nay sayers posting how bad that is and will mess up your motor is bull crap. I have tried it... along with this EGR mod and baffles removed from the snorkel ...removed my CAT added larger low restriction shorter side exit exhaust. They ALL made my truck more powerful and get better gas mileage and have better throttle response. Thats my EXPERIENCE! My truck doesent run hot or lean. It runs BETTER! I get terrific gas mileage and it improved with every mod. I tracked it and tried them on and off to be sure. Yes it will throw a 332 CEL code: EGR did not open or respond. But knowing why I simply ignore it when I check codes. Good Luck with your Trucks!

Last edited by 4Banger5speed; 01-15-2013 at 08:46 PM.
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