EGR Question...

A1cntrler

A1cntrler

Registered User
I have a 1990 5 speed SC with the EGR. I heard that the automatics did not have an EGR on them from the factory. I would like to do away with the EGR valve all together when I do my engine transplant. I don't want to have to deal with it, and really, what good does it do??

Question is: Does the intake on the Automatic SC's have the port for the EGR there and a block off bolted in place, or is it a complete different intake with the EGR never there?? Where can I get the block off plate/can I make one myself? And what do I do with the bottom on the manifold side to block it off?? I haven't ever pulled a motor out of an SC so I don't know what it all looks like just yet. I have a set of ported manifolds that I will be putting on there, but they are still packed away out of the way for now. I remember there being threaded holes in them, but I assumed they were for O2 sensors until I remembered about the EGR. Do I need a computer reprogram if I delete the EGR on my 5 speed to keep codes from coming up on the dash??

Guess that was a lot of questions....
 
I deleted the EGR on my 89 5-speed. I don't know for sure if the automatic cars have EGR, but I know that none of the newer model cars had EGR. The main benefit of the system is to help with emissions. You need a block-off nut on the exhaust manifold, I made one. You could make a plate to block off at the inlet also, just use a gasket to prevent leaks. When you get down to it, its pretty easy. You can run the car without a computer tune but you will need to have the sensor plugged in. The sensor is a grey box looking setup that attaches to the inlet plenum and should have a vaccum line attached to the bottom of it that runs to the EGR tube
 
RadiumSC said:
My 91 had the port, but was blocked off. If you can get the EEC from a 90 auto and swap it out, you won't have a CEL.

Victor at www.spinningwheels-sc.com has an egr delete kit he sells.
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I searched his site and came up with about 200 pages of spark plugs (searched for block plate as he has it typed on an intake he is selling) and When I search EGR delete I get pages of stuff for Acura IntEGRa.... What section do I need to look under?
 
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I think I read a post where xr7dave discussed the EGR system, and I believe he mentioned that it wasn't just emmisions, but actually helped to reduce the chance of detonation.
 
fturner said:
I think I read a post where xr7dave discussed the EGR system, and I believe he mentioned that it wasn't just emmisions, but actually helped to reduce the chance of detonation.
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After spending about an hour reading the pages and pages of posts on the subject, I have decided to just pay 36 bucks for a new EGR valve and put it on when I do my engine swap. It is a pain to get to, but I don't plan on taking it apart over and over. The posts I read have left me more confused on the subject than I ever thought I could be. It is about 50/50 on the have it/don't have it. Some say it helps, other say it does nothing. I'll just be careful when I pull the motor out not to break the EGR tube. If it does break though, I wonder if I could use a section of tubing of some sort the replace it with??

It has survived 17 years the way it is with the EGR, so I guess whay really mess with it...
 
i've got a 90 sc /5spd /with the EGR ,it's said the 90 auto's dont have them.

as far as a block-off - trace the gasket-using like maybe 1/8 steel flat plate ,then cut it out ,drill the plate on the same place as the gasket for the bolts ,use a gasket.

if you drop the exhaust ,the pipe that goes to the EGR will just sorta slip off.

i don't like the EGR thing ,but if i've got to do something with the computer - i don't want to do that ,at least not yet. if there was going to be some type of hp gain -i'd be tossing it

oh and the hardest part about the egr was getting the -i think it's a silicon type vacum hose onto the little gray box

cheers
 
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when i do some upgrades to my '89 sc with the leftover goodies from my '94 sc i'm gonna delete the egr system. i'm using parts off of a '90 sc parts car i have, egr delete plate, egr delete exhaust manifold and the '90 eec.
 
nickleman60 said:
when i do some upgrades to my '89 sc with the leftover goodies from my '94 sc i'm gonna delete the egr system. i'm using parts off of a '90 sc parts car i have, egr delete plate, egr delete exhaust manifold and the '90 eec.
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The 90 Autos don't even have a port for the EGR valve, do they? I thought I remembered a totally different inlet... I'll have to check when I get home! :D
 
I deleted the EGR on my 89 automatic car earlier this year when it was down for H/G's. I wouldn't have bothered, but I upgraded to 94-95 exhaust manifolds, and the EGR tube location is different on the RH manifold. I got the delete plate from Ford, as well as the block-off cap for the exhaust manifold. For the record, the car didn't throw a CEL when it was finished. I didn't notice any detrimental drivability issues.

JD
 
The only EGR related thing that would throw a CEL (that I know of) on a 89, is if you unplug the EGR transducer, like 'mywhite89' said. EGR system malfunctions MIGHT throw one... The only time I ever got a code for the EGR is when the EGR transducer wasn't functioning properly or when I unplugged it. I spend so much time on that stupid system -and nearly $100!!!- that I finally said forget it! I cut a piece of tin to bolt between the EGR valve and the inlet port and left the transducer plugged in and have driven it for a few years like that. Whenever the car gets to 250k miles, I think I'll finally retire that old engine and work on installing the rebuilt one WITHOUT EGR! Someday when I get a chip/tuner...I'll make that car forget it even had EGR.... :) ;)
 
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I just deleted mine and am getting a CEL

I justed finished changing plugs, wires, O2s, starter, supercharger, and belts on my '95. I used a blocking plate on back of the SC, and had the EGR bung removed from the header and welded shut. I have the transducer plugged back in, but don't have all three vacuum lines plugged to a good source yet. Last night when I fired the car for the first time after replacing all that stuff, it started fine, ran smooth at idle, but I got white smoke coming from the passenger side of the engine. I shut it off and looked to see if my plug wires or anything else was too close to the header, but it doesn't look like it. I am about to go out and inspect real close again and trying running it again and f no more smoke, take it on a test run. Does anyone know an alternate source to run the vacuum lines to that will work? The top one plugs to a diaphram and the bottom two come off the transducer, one marked reference, and I forgot what the other one is labled. It would be great to have the EGR gone with no CEL. :D

Don
 
Yep, that is true Jacob. I thought I remembered telling you about it a month ago, but I guess I told Jeff Bratton. I'll PM what I know about it, since it's not really related to the EGR question... :eek:
 
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