removing the egr and pair vsv's (1 Viewer)

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90339-03002

Since someone asked, here is the part number for the oem vacuum caps I used on the small lines.
 
I just ordered these and they cost about $4.5 each. If anyone was wondering what the cost is. Thanks for the info on the part #.
 
Great thread.... most of this stuff has been done on my 94. O2 sensors moved to the manifolds, ETC. The EVAP has not been deleated though...YET!!

In my experience, removing the evap system on ODB1 vehicles has had no ill affects. For ME anyway.

Also, those "HELP" branded vaccum caps are garbage. They disintegrate very quickly.
 
thatcabledude said:
Also, those "HELP" branded vaccum caps are garbage. They disintegrate very quickly.
Click to expand...

x 5 ! I figure I've gone through at least 5 of those caps myself. Always cracked to heck within a year. About all that's available from local parts stores.. kind of like blitz gas cans..

Might be worth leaving the fuel pressure vsv, it *might* be used for bumping pressure on coldstarts.
 
This thread seams to cover a pretty thorough step by step on completely deleting EGR system. Can someone post more information on jumering the EGR plug to avoid trowing codes.
 
Is there any good or bad affects from removing the smog equipment other then no more carbon buildup in the intake plenum? Change in gas mileage or power?

The egr is used to cool the exhaust to reduce some emissions. Does the '94 ecu compensate for the exhaust gas being pumped into the motor or does the O2 do that? With egr temp sensor replaced with a resistor, will the ecu think there is exhaust entering the motor?

I ran many months with no O2 (unplugged) with no ill affects in mileage and power. When I got new OEM O2's I didn't notice any change. Any reason to keep them?
 
Some good info in here. I need to add some and ask more questions.

First of all, what are people doing with the EGR pipe? Note in the drawing below:

428977228.png


PN 25601 - you have to block that off somehow. I'm thinking maybe another O2 sensor block off plate? I haven't taken it off to measure yet, and was wondering what others have done. I also wanted to get up under there and see how hard it is to get to without taking the motor out so if I COULD add one of the block off plates there.

Also, I found a part on Amazon that works kinda well for the EGR port on the intake manifold. The holes are just a little bit off from our intake manifolds:

IMG_3728.jpg


(That's the gasket from the EGR that goes against the intake manifold on the top there)

The part is for a Chevy, I got it from Amazon:

http://www.amazon.com/gp/product/B000CQFOOO/ref=wms_ohs_product_img?ie=UTF8&psc=1

Anyway, yet another pre-GSMTR rush job for me...
 
I'll answer myself since no one else is ;)

I had Sam @ Lowe get the EGR gasket for that pipe for me and compare it to the gasket for an O2 sensor.

Doesn't look like my idea is going to work for that, but I should still be able to take one of the O2 block off plates and redrill it a little. With this gasket I think it'll keep all the exhaust gases back behind the plate.

Or I could just make a new plate based on the gasket.

IMG95201304249511213995066.jpg
 
That's two gaskets. The black one is the EGR pipe gasket (PNC # 25628). Under that is an O2 sensor gasket. My idea was to take the O2 sensor block-off plate and use that on the EGR port on the exhaust manifold.

But it looks like either modify the O2 plate or make your own since the bolts won't line up right.
 
I think some people use a pipe plug from a hardware store. Or you could just squirt some JB weld in there.

Pat
 
I'm in the process of doing my head gasket and while im at it I'm doing egr delete . I cut my get pip to only leave two inches the I filled it with high temp rtv and then pinch the end closed .

Sent from my XT907 using IH8MUD
 
Well, I did it. I removed the EGR and PAIR system.

IMG_3803.jpg


Note the air intake isn't on in this pic, but you can see no more PAIR!

No more EGR!

I ended up taking some heat shield and stuffing a bit into the EGR pipe coming off the exhaust manifold, then slapping JB weld on top of that. This plugged up the pipe. I really wanted to put an O2 sensor blocking plate on there, but I really couldn't get to the bolts where that pipe comes off the back of the motor without taking off the lower intake manifold... which I wasn't really in the mood to do. So maybe some other time I'll do that.

I'll have to see if the CEL stays off or not... I haven't even driven it on the road in 3 weeks as I've been working on-and-off on a number of parts... but I have my fingers crossed. It sure does idle nice and smooth now - but that's probably due to all the other cleaning I did, not the EGR.
 
I just did this too, at least partway. I didn't have a separate need to remove the intake manifold, so I left everything underneath it untouched for now. I just blocked off the exhaust manifolds, intake manifold, and the two vacuum connectors that I disconnected. I also looped the EGR sensor wires back into each other and plugged that in. My question is, what does the open pipe from the bottom of the EGR valve lead to? I always assumed it is where the exhaust entered the egr valve, and thus the intake manifold, but I can't see where it gets fed from. I know it's not a dead pipe because it's still pouring out air/exhaust. Where does it lead to? I can see the exhaust all the way back and don't see another place it would connect in.

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7939altered_zpsba0660e3.jpg

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7940_zps9faff526.jpg

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7941_zps3237271a.jpg

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7942_zps9dc6bccb.jpg

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7944_zps9ea345cc.jpg

http://i1158.photobucket.com/albums/p602/cooleyxj/IMG_7945_zpsc32caa62.jpg
 
Last edited:
Yes that EGR port comes off the exhaust.

And if you leave it open you'll get all kinds of exhaust noises coming out of your engine bay!

My prior 'fix' failed. So I ended up cutting the EGR vacuum assembly with a cutoff wheel, and poured JB Weld into the open part of what was left of the EGR. Then I could use the nut that was on it to screw back onto that port. This seems to be working out better than my previous attempt (that actually blew off after GSMTR).
 
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