going to attempt EGR block, kinda confused
#1
going to attempt EGR block, kinda confused
after reading into several egr mods(yes, I've done the search) I think I'm more confused than ever. I want to do the simple EGR block, that way I can leave everything in place for now so it appears to be stock and to make it easy to return to stock in the unlikely event of selling it.
looking at this -> https://www.yotatech.com/forums/f116...d-3vze-186854/
its pretty obvious what part was blocked off, but from this diagram -> https://www.yotatech.com/forums/f128...cation-250923/ seems to label it as the PAIR valve. From the reading, blocking off the EGR means I don't have to tamper with the PAIR, but was the PAIR really blocked off and the EGR left alone?
looking at this -> https://www.yotatech.com/forums/f116...d-3vze-186854/
its pretty obvious what part was blocked off, but from this diagram -> https://www.yotatech.com/forums/f128...cation-250923/ seems to label it as the PAIR valve. From the reading, blocking off the EGR means I don't have to tamper with the PAIR, but was the PAIR really blocked off and the EGR left alone?
#2
not against just blocking all 3 if that won't cause any issues or make it more complicated, it looks like several who've gone the deletion route block off everything but would I then have to use the fuse trick to keep the computer from sending up a code 71?
#3
Registered User
Join Date: Sep 2007
Location: San Francisco East Bay
Posts: 8,299
Likes: 0
Received 841 Likes
on
661 Posts
EGR and PAIR are reversed in his diagram. I'm not entirely sure what the "fuse trick" is, but yes, the system will throw code 71 if the EGR system is not working. There is a way around it (there's a way around everything).
What do you hope to accomplish by blocking the EGR? Do you think it will improve performance in any noticeable way? Even Mattz604 passed on trying to explain why he did it. It sounds like he thought he was 'simplifying' his engine, but if you want to have any hope of selling your truck (or if your state starts a smog program) you'll need all those parts working again.
If you are having trouble telling PAIR from EGR, is this really the project you want to undertake? It's not like you can look it up in the manual (and your careful internet search only made it worse -- par for the course with an internet search).
You can tell my view on this whole process. The EGR's only function is to keep America's trucks (and cars, and buses, ...) from poisoning us all. Just leave it alone.
What do you hope to accomplish by blocking the EGR? Do you think it will improve performance in any noticeable way? Even Mattz604 passed on trying to explain why he did it. It sounds like he thought he was 'simplifying' his engine, but if you want to have any hope of selling your truck (or if your state starts a smog program) you'll need all those parts working again.
If you are having trouble telling PAIR from EGR, is this really the project you want to undertake? It's not like you can look it up in the manual (and your careful internet search only made it worse -- par for the course with an internet search).
You can tell my view on this whole process. The EGR's only function is to keep America's trucks (and cars, and buses, ...) from poisoning us all. Just leave it alone.
#4
Registered User
iTrader: (3)
You can just pull the vacuum line off the EGR and plug it. EGR blocked. Simple. However I suggest leaving it alone too. It doesn't hurt you in any way whatsoever. You will gain NOTHING by doing this. In fact you could be hurting yourself. The recirculated exhaust gas serves to cool the combustion temperatures- might be helpful if you are trying to avoid a popped head gasket or burnt valve.
#5
EGR and PAIR are reversed in his diagram. I'm not entirely sure what the "fuse trick" is, but yes, the system will throw code 71 if the EGR system is not working. There is a way around it (there's a way around everything).
If you are having trouble telling PAIR from EGR, is this really the project you want to undertake? It's not like you can look it up in the manual (and your careful internet search only made it worse -- par for the course with an internet search).
I'm hoping to get smoother engine performance, which has been pretty consistently reported by people who have done the mod, also will keep the engine a little bit cleaner. I wouldn't be considering doing this mod if I had seen so many positive reports from the people who have done them. I'm aware that it could increase my engine temperatures a bit, and that's part of the reason I just want to do a block off rather than complete removal of the system, if I find its running hotter I can just pull the plates out. Also, 95% of my driving is freeway and my offroading has all been between 6,000 and 8,000 feet, so not too worried about problems with pinging reported with using lower octane gas.
might be helpful if you are trying to avoid a popped head gasket or burnt valve.
#6
oh and I live in norcal and my 4runner is registered in Mono county, where now that it has passed smog once (extremely clean according to the test) I don't have to smog it again for as long as I own it.
#7
Registered User
Join Date: Jan 2012
Location: Memphis TN
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
I did it yesterday and drove all over today! It ran so much better and quieter, also I live in Memphis where today it was 101 degrees and iUit did not run hot at all. I went the route of cutting the tube rirght where it goes into the block, made a plate put of a coke can and closed it off. 30 minutes start to finish.
Trending Topics
#8
Registered User
Join Date: Jan 2012
Location: Memphis TN
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
I did it yesterday and drove all over today! It ran so much better and quieter, also I live in Memphis where today it was 101 degrees and iUit did not run hot at all. I went the route of cutting the tube rirght where it goes into the block, made a plate put of a coke can and closed it off. 30 minutes start to finish.
#9
I went the route of cutting the tube rirght where it goes into the block, made a plate put of a coke can and closed it off. 30 minutes start to finish.
#10
Registered User
Join Date: Jan 2012
Location: Memphis TN
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
I modified it a little today! I cut the tibe from the egr to the plenum and just used the mouning bracket as my plate with a beer can foled in half between the two then bolted it back up. Then I removed the egr completely and the capped the tube that it was connected to on the underside. I have done the resistor trick and zip tied it out pf the way. So much cleaner under there now!
#15
Registered User
Join Date: Jan 2012
Location: Memphis TN
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
If you are standing on passenger side by right front wheel it will be on your left. That is the one I made the plate from and cut the plenum off and also cut the tube back into egr. Then I cut the egr on the underside just above the threads and used it as a connector from the other tube to the cap I bought at home depot.
#16
https://www.yotatech.com/members/veh...4-egr-003.html
Can't get the pics to show, but here's the link to the picture in my album
Can't get the pics to show, but here's the link to the picture in my album
#17
#18
Registered User
Join Date: Jan 2012
Location: Memphis TN
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
The one in your left hand I cut on both sides of the mounting bracket with a cutting wheel and smoothed out to make flat . I used it as a template to cut a tin can to covef the whole and rmounted it.
#20
Registered User
I removed the pair and EGR. No codes show at all for the last year. Check my build thread. You have a California truck so you may have a different result since my truck was communist free. Obd1 on my 88 doesn't care if the emissions are unplugged, and yes she runs much better on a truck with over 200k.
Last edited by RBX; 08-09-2012 at 06:47 PM.