egr block questions

[selmerguy]

i am putting togeather my motor and i was going to block off the egr. my questions are:

what do i do with the wiring part of the egr system? do i remove it all the way or leave it hooked up? will it give me a cel?

 

[youkickedmydog]

i am putting togeather my motor and i was going to block off the egr. my questions are:

what do i do with the wiring part of the egr system? do i remove it all the way or leave it hooked up? will it give me a cel?

You will throw cels like its your job. Everyone has told me of different ways of doing it i suggest that you contact sean at Conceptillusion.com he sells block off kits the elminate the entire valve. He will know what needs to be done electrical wise + his kits are 14 bucks!

 

[selmerguy]

thats where i bought them from.

 

[dr1665]

There are 2 codes for EGR. One for flow and one for function. If you leave the solenoid connected, but seal the head, you'll get the flow code. If you yank the solenoid, you'll also get the code for function. I think they might be the same code on the keydance. Pretty sure it's 32. I yanked mine completely and did nothing about the CEL. Have a custom plate over the port on the head, the harness tucked back under the intake tube where no one can see it, and my secondary IAT installed in the port on the intake manifold. I would fail a visual emissions inspection in 3 seconds flat, I bet.

 

[Defiant]

Before disabling it, realize what exhaust gas recirculation actually does:

http://www.ukcar.com/features/tech/Engine/techno/exgr.htm

 

[dr1665]

Before disabling it, realize what exhaust gas recirculation actually does:

http://www.ukcar.com/features/tech/Engine/techno/exgr.htm

That's a good read, but I still manage to get 35mpg out of my fully built 420A in town without it. Intake manifold should stay a bit cleaner as well. That EGR tube was always full of sludge and the intake manifold appeared to share in that "wealth."

There are arguments both for and against it, but I think it boils down to personal opinion on this one. :shrug

 

[Doug99RS]

I bought my EGR block off kit for the neon and have yet to throw a code. I am running a mopar performance computer and that may make the difference. I blocked off my 2gnt and occasionally threw a code. On the 2gnt I had everything in place only used a gasket, the block off plate and then another gasket then the tube flange where it meets the manifold. This way everything LOOKED like it was attatched when in actuality it wasn't.

On the neon I removed everything except the solenoid. It's plugged in to the vacuum line from the brake booster and the electrical connector but that's it. No codes, no mess in manifold.

Not going to argue the actual performance benefit.

 

[Defiant]

The code only appllies to the electrical connection and functioning of the solenoid, not whether anything's actually hooked up to the plumbing side of it.

 

[WHite97RS]

only reason i did it is because i hooked up the vac lines wrong after my rebuild and killed the diaphragm, giving me a vac leak, plus is dramatically reduces the intake mani temp when your turbo.

 

[selmerguy]

well if i can keep my motor togeather long enough to make my car move then i might see some gains. ci told me if i block it off and still keep the tube in place and hooked up i should not through a cel. my new head gets here monday so if i can keep the torque down on those stupid cam caps, so the cams can actually get oil (oil good) then i will find out. btw don't over torque your cam cap bolts. bad things happen

 

[ShadowWulf]

Ive been consitering doing this to my N/T at this point in my mods.....though i have yet to actually find a concrete reason as to weather or not id get a gain out of it, so havent bothered yet.

 

[SnoopySLR]

You probably won't get gains, but it will keep your intake temps down, keep your intake cleaner, and make your exhaust smell a little more.

I port and polished my intake and didn't want to gum it up again after its all nice and shiny... thats why I got rid of mine.

 

[Doug99RS]

I know you said "Intake" Temps but alot of people may not know exactly what an EGR does. This is directly from "Automotive Emissions Control Manual" put out by Haynes quite a few years ago. It's a good book because it explains alot of different emissions related components. Here's a direct quote from it regarding EGR:

EGR valves are designed specifically to recirculate the exhaust gas with the air/fuel mixture, thereby dilluting the air/fuel mixture enough to keep the NOx compounds within breathable limits. It was discovered that short peak combustion temperatures create NOx. By blending the exhaust gas with the air/fuel mixture, scientists discovered that the rate of combustion slowed down, the high temperatures were reduced and the NOx compounds were kept within limits."

While I understand that hotter intake manifold temps may not be desired, the end result is cooler combustion chamber temps. This is the same goal people are shooting for with water injection, cold air intakes, large intercoolers and the like. Just some extra food for thought.
Doug

 

[SnoopySLR]

That is totally correct. But I don't like the gunk that it sends into the intake manifold. If our system was like older V8's, where the gas is put in at the very end of the intake manifold or even into the combustion chamber, I'd keep it. The build up in the intake is restricting and thats why I took mine off.

When pulling systems off your car, know what they do and their function before your pull it.