disable egr??

[remington115]

disable EGR i read that this will increase horse power and gas mileage i was wondering is this true or will it mess up my engine.what i read is to get a piece of sheet metal then to the parts store buy a gasket cut it out of the metal but leave the holes shut to block the exhaust from recirculation. So help me out is this a do or a dont.

 

[Wicked_Sludge]

power will not change, fuel economy will likely go down, check engine light will come on, your truck will pollute more, and the feds could slap you with a rather large fine for tampering with emissions equipment.

leave your emissions stuff alone.

 

[Kenneth S]

Don't disable it. It won't change your power and mileage.

 

[Byrd]

If power and MPG is what your hunting really your very best option is making sure everything is in tune, a simple tune up can make worlds of diffrence, followed by driving habbits (jack rabbit starts, heavy excelleration, and a/c if you've got it...)

I know cheap easy power and economy sounds great, but neither of the two are useually cheap or easy...

-Byrd

 

[remington115]

thanks now i know

 

[tbirdsps]

Besides reducing pollution a functional EGR also reduces combustion chamber temperature. This reduces nitrous oxides (the pollution) and very much reduces the chance of spark knock.

Maintaining it is in your best intrest.

 

[shadetree]

I have a 1996 F150, 302 engine, manual trans. Local driving, the EGR doesn't have much effect as the EGR works at steady driving speeds. It gets around 16.5 mpg. However, when I visit relatives 300 miles to the north, I disconnect the EGR. Mileage goes to a little over 19 mpg. I have proven this several times. Butt dyno can't tell if there is a power difference. I have read the theory on how the EGR is supposed to work, but in reality, I find it to be BS. Anytime you feed burned exhaust gasses back into the intake system, and dilute the incoming mixture, the mixture is not going to produce the same results as without the dilution.shady

 

[Byrd]

I have a 1996 F150, 302 engine, manual trans. Local driving, the EGR doesn't have much effect as the EGR works at steady driving speeds. It gets around 16.5 mpg. However, when I visit relatives 300 miles to the north, I disconnect the EGR. Mileage goes to a little over 19 mpg. I have proven this several times. Butt dyno can't tell if there is a power difference. I have read the theory on how the EGR is supposed to work, but in reality, I find it to be BS. Anytime you feed burned exhaust gasses back into the intake system, and dilute the incoming mixture, the mixture is not going to produce the same results as without the dilution.shady

Assuming the engine runs at 100% efficiency right? Even though no gasoline engine of today is that efficient.

I do share some skepticism with you though, however, not all of the exhaust gasses are burned when they exit the cylinder so if you were to recycle the unburned gasses you would think you would get a more efficient motor... now that is what makes since to me...

Also, the pre warmed already atomized unburned gas particles would burn easier and better, or so one might would think...

Just some thoughts...

-Byrd

 

[Wicked_Sludge]

the EGR system has nothing to do with recycling unburnt particles. exhaust gasses are introduced into the combustion chamber because they are nuetral (meaning they wont lean or enrich the mixture). since they take up space in the chamber, but do not burn, the result is lower chamber temps.

even if the exhaust gasses did have an effect on the mixture, the o2 sensors read after the egr tube...so the computer would easily be able to compensate for the effect.

 

[Bryan22]

If I didn't have a DPFE sending info to the computer, i would probably plug off the EGR system to test its effects on mileage and power. Too bad that isn't the case, last thing i want to do on these trucks is confuse a properly functioning system by disabling half of it. My 2 cents.

 

[Wicked_Sludge]

the EGR systems in my '89 escorts are both mechanically controlled. the red escort's system is still functioning properly, but the mechanical regulator (which takes place of a DPFE) on the blue 'scort went kaput and ive been unable to locate a functioning replacement 20-year-old emissions component, forcing me to disable the EGR. the result is unchanged power (had to knock a few degrees off timing to prevent pinging under accel.), and 2-3 MPG less then both the pre-EGR disabled state and the red escort.

 

[shadetree]

If I didn't have a DPFE sending info to the computer, i would probably plug off the EGR system to test its effects on mileage and power. Too bad that isn't the case, last thing i want to do on these trucks is confuse a properly functioning system by disabling half of it. My 2 cents.

You don't have to plug off the system. I unplug the electrical connection to the DPFE when I make my trips. Of course I get a CEL, but I ignore it for the duration.shady

 

[fishunterx]

I pulled off my intake manifold, and my EGR was plugged almost all the way on the inside of my TB, after cleaning it and opening up the port, I actually had better performance. Not sure if it was opening up the EGR, or if it was just cleaning out the TB, Either way I think it's best just to leave it. Plus I live in Portland Oregon, we have DEQ and have to pass emissions to drive our trucks.