EGR Delete Question
Thread Starter
Racer
Joined: Jul 2013
Posts: 275
Likes: 1
From: Colorado Springs
EGR Delete Question
1988 Vette, TPI
I just installed a ported intake (Stage 3), American Racing Headers (1 7/8") long tubes, Xpipe.
The headers I ordered were supposed to have the EGR tube, but shipped with out it. I thought about removing the EGR and adjusting the tune according.
To block off the EGR, could I just leave the actual EGR bolted to the top of the intake (under the plenum), and just use the EGR block off plate for the port in the intake that would connect the tube from the exhaust to intake? Or would I need to remove the EGR too and block that off as well?
I was assuming there is a passage inside the intake that travels from the actual EGR to the port in the rear of the intake that the tube to manifold bolts too.
Also until I get my tune from "91tpiman" here in the forums, is there a trick using that sensor that is threaded into that tube (temp sensor?) that connects the exhaust to intake to not throw a code?
Thanks in advance.
I just installed a ported intake (Stage 3), American Racing Headers (1 7/8") long tubes, Xpipe.
The headers I ordered were supposed to have the EGR tube, but shipped with out it. I thought about removing the EGR and adjusting the tune according.
To block off the EGR, could I just leave the actual EGR bolted to the top of the intake (under the plenum), and just use the EGR block off plate for the port in the intake that would connect the tube from the exhaust to intake? Or would I need to remove the EGR too and block that off as well?
I was assuming there is a passage inside the intake that travels from the actual EGR to the port in the rear of the intake that the tube to manifold bolts too.
Also until I get my tune from "91tpiman" here in the forums, is there a trick using that sensor that is threaded into that tube (temp sensor?) that connects the exhaust to intake to not throw a code?
Thanks in advance.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
I ran with the EGR valve on the manifold and unconnected to anything else with no apparent issues. Computer scan has no codes stored either. I cant guarantee the same no codes for you but until you decide what to do I would leave it be. I finally removed my EGR valve when I redid my head gaskets and fabbed a block off plate. There are some nice ones on eBay for about $15 and I wish I could have found the one I bought when everything was accessible.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
If the valve is in the closed position then that is all you need
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
You can get block off plates from TPIS for about $12.00.. They make both the plate for the egr hole and the one for the rear near the distributor... As Vettoz says, you don't really need it , but it looks better having a plate , then having an open hole there..When my tuner deleted the egr in my tune, that's when I installed the Dewitt's radiator and high speed fan and had my fan on/ fan off temps changed to a lower setting... I was afraid of getting pinging with the slightly higher cylinder temps after eliminating the egr...With the new radiator , new fan, I lowered my running temps down to around 180 to 183 degrees, eliminating any possibility of pinging, especially in the heat of summer....
....WW
....WW
Last edited by WW7; Mar 14, 2014 at 08:33 AM.
Thread Starter
Racer
Joined: Jul 2013
Posts: 275
Likes: 1
From: Colorado Springs
You can get block off plates from TPIS for about $12.00.. They make both the plate for the egr hole and the one for the rear near the distributor... As Vettoz says, you don't really need it , but it looks better having a plate , then having an open hole there..When my tuner deleted the egr in my tune, that's when I installed the Dewitt's radiator and high speed fan and had my fan on/ fan off temps changed to a lower setting... I was afraid of getting pinging with the slightly higher cylinder temps after eliminating the egr...With the new radiator , new fan, I lowered my running temps down to around 180 to 183 degrees, eliminating any possibility of pinging, especially in the heat of summer........WW
....WW
Racer
Joined: Sep 2002
Posts: 420
Likes: 1
From: SAN DIEGO CA
Ill be blocking off my EGR pipe at the exhaust (mainly because of an exhaust leak sound at the pipe/exhaust connection) and putting the cover over the hole in the manifold also. Did you have any issues with codes or performance issues? I have the upgraded radiator and cooling fans reprogrammed already. I also have the smog pump delete kit installed. Did you leave the egr temp sensor plugged in or did you unclip it and remove totally?
Thread Starter
Racer
Joined: Jul 2013
Posts: 275
Likes: 1
From: Colorado Springs
Ill be blocking off my EGR pipe at the exhaust (mainly because of an exhaust leak sound at the pipe/exhaust connection) and putting the cover over the hole in the manifold also. Did you have any issues with codes or performance issues? I have the upgraded radiator and cooling fans reprogrammed already. I also have the smog pump delete kit installed. Did you leave the egr temp sensor plugged in or did you unclip it and remove totally?
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Someone here had trouble getting his parts from 91tpiman. I hope you paid by credit card just in case you got stiffed too.
You can really clean up the engine bay by removing the AIR diverter valve and the "smog" pump.
I got my kit from Corvettemods here on the Forum. Gives you a little more bling and a lot more room for maintenance and cleaning.
Here is the pic of the kit just after installation:
You can really clean up the engine bay by removing the AIR diverter valve and the "smog" pump.
I got my kit from Corvettemods here on the Forum. Gives you a little more bling and a lot more room for maintenance and cleaning.
Here is the pic of the kit just after installation:
Last edited by corvetteronw; Mar 31, 2014 at 07:51 PM.
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Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
That looks great Ron. A little bird told me someone took care of Mr Soden's programming issues and he's up and running just fine. He can leave everything intact, and because it's no longer calling for either EGR, or AIR neither needs to be removed. However, it would be wise to install a EGR block off plate at some point to eliminate any chance of a carbon filled valve that could possibly create a small vacuum leak. Removing any unused vacuum hoses will clean things up, and lessen any chance of future hose cracks and leaks also.
Thread Starter
Racer
Joined: Jul 2013
Posts: 275
Likes: 1
From: Colorado Springs
That looks great Ron. A little bird told me someone took care of Mr Soden's programming issues and he's up and running just fine. He can leave everything intact, and because it's no longer calling for either EGR, or AIR neither needs to be removed. However, it would be wise to install a EGR block off plate at some point to eliminate any chance of a carbon filled valve that could possibly create a small vacuum leak. Removing any unused vacuum hoses will clean things up, and lessen any chance of future hose cracks and leaks also.
I have the EGR block off plate installed on the back side of the intake, I left the EGR in place as it can not pull any air since the block off plate is installed... If you think it's wise to remove the EGR, I will and block that off too.
The AIR has been disconnected in my Corvette. I left the pump in place and pulled the wires guts and tubing. I like the OEM bracket compared to the aftermarket AIR pump replacement pully.
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
That looks great Ron. A little bird told me someone took care of Mr Soden's programming issues and he's up and running just fine. He can leave everything intact, and because it's no longer calling for either EGR, or AIR neither needs to be removed. However, it would be wise to install a EGR block off plate at some point to eliminate any chance of a carbon filled valve that could possibly create a small vacuum leak. Removing any unused vacuum hoses will clean things up, and lessen any chance of future hose cracks and leaks also.
Thread Starter
Racer
Joined: Jul 2013
Posts: 275
Likes: 1
From: Colorado Springs
There are 2 vac lines running with the wiring harness on the drivers side, front fender, one is for the EGR which connects to the EGR Control valve mounted on the stud for the T-Stat housing, that feeds the valve with vac so when the ECM calls for EGR function, that valve will open, and vac will pull the EGR from the valve.
I left those in place, since I left the actual EGR valve on the intake and just plugged the port in the rear of the intake. No need to plug exhaust since the headers have no EGR port.
One thing I was told and read here, keep that engine running cooler so the EGR function is not needed.
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
The way I see it playsdixie, the vac coming off the bottom of the throttle body is the feed creating the vacuum for the EGR system. I left that in place just in case something else is running off that.
There are 2 vac lines running with the wiring harness on the drivers side, front fender, one is for the EGR which connects to the EGR Control valve mounted on the stud for the T-Stat housing, that feeds the valve with vac so when the ECM calls for EGR function, that valve will open, and vac will pull the EGR from the valve.
I left those in place, since I left the actual EGR valve on the intake and just plugged the port in the rear of the intake. No need to plug exhaust since the headers have no EGR port.
One thing I was told and read here, keep that engine running cooler so the EGR function is not needed.
There are 2 vac lines running with the wiring harness on the drivers side, front fender, one is for the EGR which connects to the EGR Control valve mounted on the stud for the T-Stat housing, that feeds the valve with vac so when the ECM calls for EGR function, that valve will open, and vac will pull the EGR from the valve.
I left those in place, since I left the actual EGR valve on the intake and just plugged the port in the rear of the intake. No need to plug exhaust since the headers have no EGR port.
One thing I was told and read here, keep that engine running cooler so the EGR function is not needed.
i'm in s florida....ran it today....in the 80.s....never goes over 180
but I also have that vac line under my throttle bdy and only one on the drivers side...I completly removed the egr...any idea's where that one goes"....if nothing else needs vacuum, i'll rip it all out...clean it up a bit...lots of lines down by those canisters...wondering if I need them...i'm sure somebody...probably everybody but me...will know...that's why I love the forum....
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Make sure and scroll down to the correct application.
http://www.chevythunder.com/fuel%20i...nes.htm#VACUUM LINE DIAGRAMS
http://www.chevythunder.com/fuel%20i...nes.htm#VACUUM LINE DIAGRAMS
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Make sure and scroll down to the correct application.
http://www.chevythunder.com/fuel%20i...nes.htm#VACUUM LINE DIAGRAMS
http://www.chevythunder.com/fuel%20i...nes.htm#VACUUM LINE DIAGRAMS
