• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

benefits of blocked egr?

99prixgt

99prixgt

club of used to own a gp
Is it just for emissions? If i block it off, would i get all that carbon build-up in my t/b, s/c, and lim? what's the good and bad when removing it? I was thinking of blocking it off while keeping it in tact for emission's check.
 


None. It ****s with the emissions system in your car. the ecm would wanna lean out on the fuel because it thinks there's unspent fuel coming from the egr valve. when it runs like that, it's going to get hot and pistons will pay for it.not a good way to go.. at least that's my opinion on it.
 
I think it would be more beneficial in an intercooled setup, as the EGR just recycles exhuast into the intake in order to dilute the air/fuel mix and thus keep the burn cooler.

the cooler air from an intercooled setup would keep cylinder ignition temps down and then you'd have the added benefits of a cleaner burn/intake if you blocked the egr off.

although I am just learning all about this myself so I could be mistaken
 
I myself am just getting into these newer cars so my opinions and ideas may be based on older conclusions. it would be just my opinion that since the ecm would want to keep an optimal a/f ratio it would factor in the egr's figures and calculate thusly. without that unspent fuel in the mix, it would run lean no matter what the o2 sensor adjusted for because it would always be basing its calculations on an incomplete set of references. as I said though, I base this on some older stuff.
 
Almost everyone deletes their egr when they have a chance especially if they do not have to worry about emission laws. The only thing it will do is throw a code which can be deleted with a tuner. Im almost 100% sure it does nothing with the a/f ratio or make you run lean if you have it deleted.
 
wouldn't the computer send a signal to the solenoid to open up the valve though? and wouldn't the o2 sensor be telling the computer that x amount of unburnt gasses are in the exhaust leading the exhaust gas recirculation valve to open letting those gasses get mixed into the intake? wouldn't the ecm adjust the a/f for those gasses from the egr? as i said though, i base this on slightly older cars than most folk here.
 


osirus said:
None. It ****s with the emissions system in your car. the ecm would wanna lean out on the fuel because it thinks there's unspent fuel coming from the egr valve. when it runs like that, it's going to get hot and pistons will pay for it.not a good way to go.. at least that's my opinion on it.
Click to expand...

The PCM has a way of knowing if the EGR is blocked. Also, when the EGR is running it doesn't lean it out. It uses less fuel because it uses less air (since exhaust gas is taking the place of intake air, and it's inert). It still maintains a 14.7:1 ratio of fuel to fresh air. Exhaust gas is inert so it doesn't count in the ratio. It will also boost spark advance when the EGR is properly functioning.

Don't worry about blocking your EGR. The car will run fine without it. I've had mine disabled via the PCM (stays shut) and I still got 33MPG on my six hour trip a couple weeks ago. I now have mine blocked with two blocking plates and completely removed. Couldn't be happier.

It won't completely stop carbon buildup (only way to do that is not allow any air into the engine). But it will certainly make it buildup nowhere near as fast since exhaust soot isn't coming in.
 
less dirty intake, but that is about it. it helps with adding timing during cruise so if you dont tune for it then it wont help anything.
 


You must log in or register to reply here.
Back
Top