Removing EGR system on 5sfe, sorry if its a repost.. redirect if is Options

[NEVERSTOP]

well can it be done.. and if so what are gains/cons also am pretty sure this would trigger a check engine light.. how can I rewire it to fix that.

Thanks
NEVER

[Supersprynt]

really wont gain anything, not worth your trouble.

[macavely]

well i was thinking about doing this.. the more i read up on the egr system... man reason for it being there is so less carbon-minoxid (sp) would get in to the air .. so by removing it you would have more fresh air into your engine and less heat also.. so i think you would get gains from it.. and other mods would gain you more power... as for not getting the check engine light.. might want to try to reposition the sensors to trick the ecm..

[Supersprynt]

No man, thats wrong. You wont see any performance from getting rid of it. The EGR doesnt operate at open throttle, removing may even increase chances of detonation.

The ONLY reason you should remove it is if its not working properly or you need space in the engine bay.

This post has been edited by Supersprynt: Sep 8, 2004 - 7:16 AM

[macavely]

[NEVERSTOP]

[Digndoug]

I was going to say, My check engine light has been on for about 5 months.. an its the egr. I havnt replaced it because i figured soon after it came on.. I was gunna do the swap.. an kept pushing off the swap. an now i dont have time. I need to replace it because I will have emitions soon.. but It hasnt effected my engine at all. but should I replace or remove???

[NEVERSTOP]

well if you have to do emmission test then you need to leave it on there.. I fortunately dont have to do emmissions yet.

[97Celica]

mine got clogged once and it ran like crapola. It can do a bad number to your engine..don't mess with it!

[Digndoug]

I talked ot my buddie an he said it would only make it worse..

[NEVERSTOP]

97Celica what exactly happened and how did you fix it?? dont think mine is clogged cuz the car idles fine and cant find ne visual probs with it.

as for the egr system the most I can find in the toyota repair manual is that it regulates all engine conditions for the reduction of exhaust emissions.. that would tell me that its keeping the A/F mixture lean and recirrculating the blow by gas..

figure if I rerouted the blow by into the exhaust system or just to the underside of the car and capped off the air lines on the intake manifold... kinda like an aftermarket intake manifold it would run fine.. would trip up a check engine light but have that already and im sure there is someway to rewire it to not trip the check engine.

I want to know if it will hurt my motor in anyway if removed.. I understand that if there is problems with the EGR it would possible affect performance.. kinda like you remove one of the vaccum lines from the throttle body and the car stalls.. but I wanna know if its completly removed will it hurt nething.

Example will I have to clear it out of the ECU... like 0's accross the board for the EGR?? Pretty sure that the JDM/European specs didnt have EGR's... could someone confirm this for me?

K2 u posted about this once a while back.. u got ne tips?

Thanks
NEVER

[recneps]

im pretty sure i remember something about jdm having a internal egr.

also can someone confirm that jdm emissions are a lot stricter than they are here.

[97Celica]

My EGR valve was clogged, blackish smoke kept comin out of my exhaust and it was rough idling..I did a tune up and it didn't help..My engine check light kept coming on and I brought it to my uncle's shop..I hooked it up to the computer and it said it was EGR related..So, I ordered a new one and installed it the next day..It's simply 2 bolts and a gasket..my old one looked like there was black charcoal chunks stuck in it and the cylinder to allow the air/fuel was messed. My uncle said it was probably because of all the fuel additives I used to run and because of my running the engine harder than normal.

[celicaboston1983]

my check light is still on after a year and 2 egrs from toyota. Dont know what is going on shop told me not to worry about it and it has been a year and it hasnt gave me any problems.

[Kwanza26]

I don't think removing the EGR system will actually solve your code issue. That's one of the annoying things about OBDII (tries to think for itself too much). I think there is a way to be rid of the code and the EGR system... but let me check up on that and I'll try to get back to you guys...

[NEVERSTOP]

LOL I was just gonna IM you kwanza about your opinion on this... let me know - still undecided

thanks

edit: keep in mind this is for a 5sfte project and I will be running 93+ octane

This post has been edited by NEVERSTOP: Sep 9, 2004 - 12:08 AM

[Kwanza26]

[NEVERSTOP]

well what I can come up with threw reseach on it is this:

The EGR isnt really nessary but does help to a certian degree with detonation.

basically the EGR isnt functional at WOT but does help with midrage detonation.

the thing is that you will encounter almost no midrange detonation newayz so there isnt much point.

some people say that the most cons they notice are:

higher temp
timming issues
some detonation

but alot of people seem to have done it with no cons

Pros:

no nasty build up in throttle body/intake manifold
more space


Some say that doing this will lower the intake temp by not using exhaust gases.. others say it will raise combustion temp by the lack of spent carbon in the combustion chamber

personally I think it would allow a little more a/f mix into the chamber... and well... "my daddy always told me it took gas to go fast"

really dont think it would make a difference though HP/performance wise that would be noticable.. do think it would provide a cleaner running engine longer as there would be less build up in the Intake side of things.. but a Oil catch can would do that also for me.. which I have one...would just need to figure out what exactly is tripping up the CEL...

Kwanza.. did read that there is a electrical fix to the CEL but not sure what it was off hand.. www.mr2oc.net has the topic there.. will link if I can find agian

BTW.. OBDII was the worst thing ever invented...

[Snarfer]

Unless you will be running a stand alone I would not remove the egr on a modern car. It reduces NOX which occur at combustion temperatures > 2500 i think, by diluting the A/F with exhaust gases to lower the combustion temperatures. During warm-up, idle, wot the egr isn't even on. The ecm also depends on the functionality of it, and will advance timing, or reduce injector time during high egr operation to reduce and sometimes improve the performance of the engine. The ecu uses a egr gas temperature sensor to determine if the egr is working or not. Low egr flow can cause detonation, and no flow can cause severe detonation, especially if the ecm is counting on the egr working.

This post has been edited by Snarfer: Sep 9, 2004 - 12:45 AM

[NEVERSTOP]