EGR valve delete: good, bad, indifferent?
Thread Starter
1st Gear Member
Joined: Dec 2010
Posts: 112
From: Florida
EGR valve delete: good, bad, indifferent?
Been reading a lot on here that people have been removing their EGR valves. I was wondering if there were any benefits to this/any down sides. I live in FL so emissions tests are nonexsistant.
Thanks in advance,
Endrance
Thanks in advance,
Endrance
TECH SAVANT
Joined: Dec 2006
Posts: 10,937
From: Saint Augustine, FL
Other than "cleaning up" the engine bay there is no advantage, and a slight disadvantage as unlike a lot of "emissions stuff" the EGR actually improves fuel economy while cruising at steady speeds (the only time it's active).
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
Thread Starter
1st Gear Member
Joined: Dec 2010
Posts: 112
From: Florida
Thanks for that info cliff. I was thinking there was some sort of advantage seeing as so many people have done this. I think ill be keeping mine on since I don't drive my cars to shows and I'd love to keep my 1/4 mpg since I drive a lot of highway 
5th Gear Member
Joined: Sep 2006
Posts: 4,039
From: CA
Other than "cleaning up" the engine bay there is no advantage, and a slight disadvantage as unlike a lot of "emissions stuff" the EGR actually improves fuel economy while cruising at steady speeds (the only time it's active).
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
Chupacabra
Joined: Jul 2004
Posts: 9,621
From: wilkes-barre PA
I delelted mine and felt no negative effects, cleaned up my idle a bit actually. Had to get a new tune file with the EGR shut off because after delelted it I kept tripping lean codes, no problems after the new tune was sent to me.
2nd Gear Member
Joined: Dec 2006
Posts: 319
From: Oregon
Other than "cleaning up" the engine bay there is no advantage, and a slight disadvantage as unlike a lot of "emissions stuff" the EGR actually improves fuel economy while cruising at steady speeds (the only time it's active).
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
By introducing already burned exhaust gases into the intake it reduces combustion chamber temperatures (already burned gases cannot burn again). Along with reducing oxides of nitrogen emissions this lowered combustion temperature also allows more advanced timing, which improves overall engine efficiency.
That said, the EGR valve on my '03 was sticking/stuck about a year ago, causing a surging at light load acceleration, so being of Scottish descent I just disabled it in the tune--if I get ambitious some day I will likely remove it.
It cost me maybe 1/4 mpg on the highway...
So can I just delete the pipe from the EGR valve to my long tube header without throwing any codes for the time being untill I have the car retuned? Basically cap off both ends the pipe goes into. OR what is the best way to delete the EGR setup??? Take off the pipe and plug both ends and leave the valve still connected to the plenum and the electrical plug still connected. if this route what do you do about the rectangular thing the y's off the EGR pipe with a smaller pipe( the MAP I think)??? OR if you delete the entire thing do you pull the whole unit off the plenum, do a block off plate and then plug the header pipe? again what do you do with the MAP and the electrical connections. How did you guys delete your EGRs