My EGR Blocked setup with pics

[tondef_82]

Hey guys just wanted to share my setup with you. Now its sucking good clean air instead of
nasty exhaust smoke. I'm looking into a way to have it filtered, but for now it will stay this way.
Not really sure if it has any improvement in performance. Here are some pics.
And please i know my engine bay is dirty so no comments please


This is the EGR Block off plate i used on the head.

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Here is a side view.

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This is were i placed the EGR itself. Upfront and upside down.

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This is the Intake part i left unblocked. I had to saw the rest of the metal pipe off and used
a 5/8 tube in place of the metal one.

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This is my (dirty) engine. You can see were the EGR is located.

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[ndsti]

I would put lock washers on those bolts, they might vibrate out.

 

[absolute_DSM]

Better minimize those pics to below 700x700.

Also, blocking off your EGR does absolutely nothing to your car except maybe hurt mileage. But to each his own.

 

[TSIMonsteR]

But if you have a faulty EGR, blocking it is a good option.

 

[rich3389]

Its a cheaper option....I blocked off my egr and threw my perfectly good working egr valve in the trash

 

[Talon ESI-T]

Whatr he is trying to do is keep the dirty exhaust gas from entering the manifold but not trip a CEL. It will work but as stated above, the ECU alters the fuel pulsewidth expecting hot exhaust gas to enter the manifold. With cold air entering the fuel mixture will be inaccurate and in turn affect gas mileage.

When the EGR opens and warm air enters the manifold, the ECU runs the mixture lean because less fuel is reqd at cruise with warmer intake air. Cooler air is much more dense and requires more fuel to keep the same mixture.

Terry

 

[VelocitàPaola]

That sounds reasonable, Terry, but doesn't the EGR system only function under closed loop mode? If so, I would think the AFR would stabilize since the ECU is continually using feedback from the O2 sensor and others to calculate fuel injector pulsewidths. At WOT, it should be a non-issue since the EGR valve stays closed. That's just my reasoning, though. What do you think?

 

[Talon ESI-T]

Your correct Paul. but see thats the point. At cruising, say on the highway or around town (in closed loop) the ECU opens the EGR and drops the pulsewidth to run lean. This saves fuel and increases MPG.

Now take away the warm air, the ECU will run lean and see that their is an issue with the AFR. So the ECU will respond to richen the fuel mixture. Now your losing MPG.

Understand now?

 

[VelocitàPaola]

Ah, I see your point now. Yes, that sounds like a definite problem if you're concerned about MPG (which I think most of us are).

 

[Locke]

I agree with EGR removal affecting MPG, slightly. I still believe the negatives and positives of EGR removal are both minor, and subjective.

(To contribute) Exhaust gas contains very little oxygen - much less than heated air; I believe the larger contributor to reduced mileage is due to the exhaust streams displacement of oxygen in the intake tract, with its temperature and density being a lesser issue.

 

[tondef_82]

Hey thanks for the comments guys. I knew that people would have mixed feelings about
this setup. Its just that i didn't what to block off the whole system completely. My CEL light
is gone, works pretty good to me. You see to me this is like adding an oil catch can. It may
not improve you performance. I'm just trying to keep my intake and combustion chambers
clean. Its just for my peace of mind. Not very concerned with mpg. With the current gas
prices i should be right?

 

[XMasta19]

Exhaust gas is just that, exhausted. There should be very little to no oxygen content. The ideal products of a complete combustion, are simply CO2 and H2O. O2 levels vary as if on a seesaw with CO. Carbon Monoxide is the product of an incomplete burn of the hydrocarbon vapors. More CO points to a rich mixture and vice-versa. O2 also goes up in the situation of a misfire, and increases with the severity of said misfire. So when the post catalyst oxygen sensor reads too much O2, it assumes there is a lean condition and increases fuel delivery accordingly. This is what Terry was referring to in the fact that cooler air is more dense and indeed contains more oxygen by content.

So basically...removing your egr is pointless. Just leave it hooked up and run seafoam etc every now and then if you're really concerned about the "nasty exhaust smoke".

 

[mitsocruiser]

I pulled my egr the other week I have yet to notice a difference in mpg could be do to my driving style but I don't see the harm in pulling it plus it cleans the motor bay up just a little bit more

 

[XMasta19]

Exhaust Gas Recirculation is an emissions control device, it's there for a reason. If your state has an Inspection/Maintenance program, you're gonna fail without question. We're slowly killing our environment, and everyone will eventually be required to abide by California Air Resource Board standards. I too had my egr blocked off on my eclipse back in the day, but with more technical knowledge I've come to realize that resistance is futile

 

[NeMiZiS]

I pulled my egr the other week I have yet to notice a difference in mpg could be do to my driving style but I don't see the harm in pulling it plus it cleans the motor bay up just a little bit more

I'm all ways trying find some way clean up my engine bay. So, you just took the whole thing out completely?...I've heard if you have a bad EGR it can mess up your idle, and my car never really has idled right. So I'm thinking, I should do this mod.

 

[pazsion]

Whatr he is trying to do is keep the dirty exhaust gas from entering the manifold but not trip a CEL. It will work but as stated above, the ECU alters the fuel pulsewidth expecting hot exhaust gas to enter the manifold. With cold air entering the fuel mixture will be inaccurate and in turn affect gas mileage.

When the EGR opens and warm air enters the manifold, the ECU runs the mixture lean because less fuel is reqd at cruise with warmer intake air. Cooler air is much more dense and requires more fuel to keep the same mixture.

Terry

cold dense air needs less fuel for the same amount of power produced..

warm air has less oxygen, particularly after 90*. and so needs more fuel to combust that air and produce the same power.

forced induction only requires more fuel to make a useable ratio. to the ammount of air being forced into the engine. but this is not what is popular these days..blame the oil companies i do.

 

[Blackndropped]

Well if you have a port and polished head and intake you might wanna keep it clean...so it does something

 

[Mitxubishi]

Yea so I finally came to the conclusion that im in the same boat as most ppl. Bad egr valve with faulty code, but I have the most imfamous NC inspections for my girl . Been readin these posts all day so don't need much info but one advice. Buy new egr valve and replace it and call it good, only $100 for a new one with 2 yr warantee.... wot ya think?

 

[Shadow98]

If you need to pass emissions, yes, buy a new EGR. If not, just block it off and save yourself a few bucks.

 

[tondef_82]

I'd suggest the same thing. If you need your car to pass emissions get yourself a new egr. If not block it off and do what I did. Since January that I did this I haven't had a cel light come on. (Base on the egr anyways.) Idle is good and my mpg is good too. No regrets what so ever with this mod.

 

[Shadow98]

I'd suggest the same thing. If you need your car to pass emissions get yourself a new egr. If not block it off and do what if did. Since January that I did this I haven't had a cel light come on. (Base on the egr anyways.) Idle is good and my mpg is good too. No regrets what so ever with this mod.

You must get the $500 emissons test, since you live in Cali (the tuner hater state).

 

[tondef_82]

Not really. Car has been exported out the country. Cali's rules don't apply to me.
Live real close to the border and and can drive the car with out of country plates with no problem.

 

[Shadow98]

Cool!