EGR Delete?

[huskyfan23]

What's the point of an EGR delete? That's the little valve, right? I may need a new one because of my idling but then also heard of a delete.

 

[rocklaurence]

First, its illegal to remove anything from the emissions. However, I recently installed a 96 motor (EGR) to replace a 93 (w/o EGR) and the 96 was filled with soot from the thottle body back while the 93 was as-clean-as-a-whistle. The EGR is NASTY IMO.

 

[huskyfan23]

Well I don't have to go through emissions, but I don't wanna do this EGR delete if it's not gonna be noticeable. What would be expected in gains?

 

[Nate1]

I dont really understand it either, but two things I can think of is exhaust is VERY hot and therefore wont respond well to being heated again (its already less dense, it wont expand much... less power), and it is not 21% oxygen anymore, I suspect it is much less than that.
Still, I have no idea what it REALLY does...

 

[james t]

before i begin, i in no way am reccomending that you delete the EGR. i am here mainly to inform. as we all know, its illegal to disconnect any emissions equipment whether you have inspections or not.

the EGR (Exhaust Gas Recirculation) is there to lower the nitrous content of the exhaust made by high combustion temps. basically, a small amount of exhaust is dumped into the intake to cool the combustion temps down. i know this sounds wacky, but its true. in all honesty, the EGR doesnt do alot on the "emmissions reduction" scale. ive seen several times a car pass the tailpipe sniffer with EGR deleted.

there is no way of knowing what kind of gains you can get by removing the EGR. EGR closes off at wide open throttle, so there is no way for it to show up on the dyno or in 1/4mile runs. ditching it does make the car slightly more responsive, and my guess would be around 5 - 8 hp in the midrange/part throttle opening. a chip will need to be burned with EGR delete so you will not get a CEL.

 

[plrs x45]

Being a past big mustang racer, the EGR delete did nothing. Do not waste your time.

 

[Rhett]

Ok. Let me get this straight. My interpretation of the emissions laws was that, if your year of vehicle didn't have EGR originally, then you don't need to have it ever on that vehicle to pass emissions. That may not be true in Cali but many other places I think it is.

So rocklaurence has a 1993 Explorer that did not have EGR. So, he could put a 1996 engine in, and delete the EGR legally. Am I right on this?

 

[plrs x45]

in Illinois, you would be correct. The law states that an engine may be replaced under the same restrictions of that model year. That is my understanding. Good luck!

 

[Rhett]

That's the same as in Missouri then too.

So in at least some states (probably not California), you CAN legally remove EGR if you own a 91-93 Explorer and were to drop in a newer engine w/EGR. You could legally delete the EGR and get the appropriate non-EGR computer...

just bein' technical...

 

[Runnin'OnEmpty]

EGR allows an engine to run a leaner fuel mixture, so if it's removed, the engine may experience more detonation/pinging. I suppose this could be overcome by installing bigger injectors.....? Just something else to think about.

 

[james t]

all you need is a custom chip.