help on egr removal

[kouki_hmongster]

yes i did search and even read through the fsm, but i am a bit confused after reading the stickie and some thread about egr removal.

this is the intake manifold for 91 ka24de.

okay i heard that if i remove my carbon(charcoal) canister the engine would idle a little higher, so what i plann on doing is keeping it and removing all my egr/canister control solenoid vavle and S.C.V control solenoid valve in the picture below.



but i was wondering would i have to keep my swirl control vavle(butterfly valve) and use the vac line from carbon canister. (the one w/ the 'Y' fitting)



then use this line that i am pointing at for the fuel pressure regulator.



but then i find out that i have a vac line left, should i just block this one off(the one on the top that seems to go into the throttle body)?



please help me out, i dont want to have a vac leak and have to take everthing out since my engine is going in after i get my engine mount in. also if i dont have to keep the carbon canister then i wont. thats if it doesnt mess w/ the idle or anything.

Thanks in advance.
Modified by kouki_hmongster at 11:57 PM 8/30/2008

[Firewind]

I have a 91 240sx as well and I never had a problem with the charcoal canister making my idle high... it idles around 750 RPM, highest idle I get is about 1200 for the first few minutes of warm up. If you did notice it being high, you could adjust it.

You should be able to remove all the vac lines there. Remove your butterflies, block the holes off. (Don't forget to block off the hole from screw you take out to remove the rod for the butterflies.)

I use the same vac line for my FPR, you should be fine.

I just blocked that one off on the throttle, however you may want to use it for your charcoal if you keep it...

Hope this helps

[WDRacing]

I have always found that unless I was removing everything it's best to leave what's there from the factory. I have always run into troubles removing things that didn't NEED to be removed...if that makes sense.

But I have owned several cars that I removed everything but the essentials. My own method for this is to disconnect things one line at a time, then screw in a self tapping sheet metal screw and use a tie strap or hose clamp tightened just enough to call it snug. Over tightening causes more leaks then worn hoses.

That way I make sure everything has been plugged.

WD

[kouki_hmongster]

okay i am dumb i reread the thread for egr removal and i found out that there are two vac lines for the carbon canister, one small(vac line) and one bigger(purge line). i found out that i would have to use the bigger line(purge line) for bov or something and if not used then it would Cause high idle. So actually i am now removing carbon canister.

so the vac line in the picture that goes into throttle body is okay for fpr?

what about the metal vac line in the picture where my fingure is pointing to. can i use that line for the fpr instead and just block off the line that goes into throttle body?

also is there any use for the butterfly vavle? would i notice any difference by removing it?

sorry for all the noob question. thanks

[kouki_hmongster]

Thanks WD, i guess i'll be removing butterfly vavles and carbon canister since it doesnt do much now that i am removing all my egr solenoid.

[Firewind]

Sorry I may not of had been clear in my post. The one you are pointing at in the picture at the back of the intake manifold is the one that you want to use for your FPR. I use it too. I plugged the throttle body vacuum off.

Don't worry about it, I was very confused when I removed my EGR as well, at least it sounds like you have yours pulled out of the car.

[240sxvaj]

one question, can you remove the 4 vavles for the butterfly vavle and still keep the rod and the whole butterfly vavle? there wouldnt be any vac leak from this or should it be seal w/ jb weld?

[kouki_hmongster]

Sorry I may not of had been clear in my post. The one you are pointing at in the picture at the back of the intake manifold is the one that you want to use for your FPR. I use it too. I plugged the throttle body vacuum off.

Don't worry about it, I was very confused when I removed my EGR as well, at least it sounds like you have yours pulled out of the car.

yeah thanks, i'm using it for fpr and the throttle body vac i'm blocking off and using the bigger vac line. also using the bigger vac line that use to go to canister for my bov only so that i wont have high idle. everything should be fine now i hope.

i have a built motor thats why i have it out at the moment, waiting for my jgs mounts and clutch before i can put the motor back in.

[Firewind]

Sounds good man. I just blocked off mine with a set up a little vacuum cap. I got it at autozone, they work well and don't leak, I think I fould it in there "HELP" section which had a bunch of vacuum caps in a pack and I bought those...

one question, can you remove the 4 vavles for the butterfly vavle and still keep the rod and the whole butterfly vavle? there wouldnt be any vac leak from this or should it be seal w/ jb weld?

To answer this question, unscrew the tiny screw that holds the rod in place, remove the rod, JBweld the end were the rod slides out from and the screw hole (or just return the screw into it, should be enough to block it off.) As far as the holes that are left in between each of the manifold tubes, they can breath between each other, or you can block them off. Either way seems to be fine.