TheAMCForum.com Homepage
Forum Home Forum Home > The Garage > AMC 6 Cylinder Engine Repair and Modifications
  New Posts New Posts RSS Feed - egr question for Pacer 258 engine
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

egr question for Pacer 258 engine
 Post Reply Post Reply Page  12>
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
dodgemahal View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Dec/11/2015
Location: Illinois
Status: Offline
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dodgemahal Quote  Post ReplyReply Direct Link To This Post Topic: egr question for Pacer 258 engine
    Posted: Sep/26/2017 at 11:50am
Is there any harm in running ported vacuum directly to the egr valve, and bypass the cto switch and exhaust back pressure doo-hicky? Thanks.
Back to Top
Gelalthedamned View Drop Down
AMC Nut
AMC Nut
Avatar

Joined: Nov/28/2014
Location: Athens ga
Status: Offline
Points: 376 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gelalthedamned Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 12:43pm
Anything called "doo-hicky" is optional delete
Calamity - 73 Gremlin X zombie rod (daily driver)
Back to Top
purple72Gremlin View Drop Down
AMC Addicted
AMC Addicted
Avatar
Charter Member

Joined: Jul/01/2007
Location: Illinois
Status: Offline
Points: 16614 		Post Options Post Options   Thanks (1) Thanks(1)   Quote purple72Gremlin Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 1:08pm
the cto is there so the EGR isnt operating until the engine is warmed up......when the engine is cold you dont want EGR.....it wont run very well.....but you can do whatever you want. 
Back to Top
dodgemahal View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Dec/11/2015
Location: Illinois
Status: Offline
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dodgemahal Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 1:51pm
Originally posted by purple72Gremlin purple72Gremlin wrote:

the cto is there so the EGR isnt operating until the engine is warmed up......when the engine is cold you dont want EGR.....it wont run very well.....but you can do whatever you want. 

Yes, I suspected that but was wondering if anyone does it. Where can you buy a CTO?

When you buy an egr valve does it come with the back pressure doohicky?
Back to Top
purple72Gremlin View Drop Down
AMC Addicted
AMC Addicted
Avatar
Charter Member

Joined: Jul/01/2007
Location: Illinois
Status: Offline
Points: 16614 		Post Options Post Options   Thanks (0) Thanks(0)   Quote purple72Gremlin Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 2:18pm
You need the number off the EGR valve. The original one. That number is what you need to replace it with. Alot of the aftermarket ones really don't work well.
Back to Top
DaemonForce View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/05/2012
Location: Olympia, WA
Status: Offline
Points: 1070 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DaemonForce Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 5:00pm
Originally posted by Gelalthedamned Gelalthedamned wrote:

Anything called "doo-hicky" is optional delete

Advice of the century. LOL
1971 Javelin SST
American 304 2v | FMX | AM20-3.31
1983 American Limited
Jeep 4(.7)L S-MPFI | 1982 NWC T-5M (4.03/.76) | Dana30IFS/35-2.72
Back to Top
amcfool1 View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jun/18/2011
Location: roanoke va
Status: Offline
Points: 1075 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amcfool1 Quote  Post ReplyReply Direct Link To This Post Posted: Sep/26/2017 at 10:33pm
cto is still available most anywhere, or rockauto, good luck, gz
george z
Back to Top
farna View Drop Down
Supporter of TheAMCForum
Supporter of TheAMCForum
Avatar
Moderator Lost Dealership Project

Joined: Jul/08/2007
Location: South Carolina
Status: Offline
Points: 19689 		Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Oct/02/2017 at 6:09am
It's not going to hurt anything to just disconnect the EGR from vacuum as long as it seals. EGR only works when the engine is at full operating temp (hence the CTO) and combustion chamber temp is really hot. Then it lets a little exhaust gas in to dilute the fuel/air mixture and thus lower chamber temp at idle or low speeds -- doesn't operate at higher speeds above around 30 mph. This reduces one of the polluting gases at idle when the combustion chamber temp is high. With few cars even running EGR (other things reduce combustion chamber temps, or that problem has been designed out), you're not going to make much of a contribution to pollutants, especially since the car isn't driven a lot.
Frank Swygert
Back to Top
purple72Gremlin View Drop Down
AMC Addicted
AMC Addicted
Avatar
Charter Member

Joined: Jul/01/2007
Location: Illinois
Status: Offline
Points: 16614 		Post Options Post Options   Thanks (0) Thanks(0)   Quote purple72Gremlin Quote  Post ReplyReply Direct Link To This Post Posted: Oct/02/2017 at 6:32pm
Originally posted by farna farna wrote:

It's not going to hurt anything to just disconnect the EGR from vacuum as long as it seals. EGR only works when the engine is at full operating temp (hence the CTO) and combustion chamber temp is really hot. Then it lets a little exhaust gas in to dilute the fuel/air mixture and thus lower chamber temp at idle or low speeds -- doesn't operate at higher speeds above around 30 mph. This reduces one of the polluting gases at idle when the combustion chamber temp is high. With few cars even running EGR (other things reduce combustion chamber temps, or that problem has been designed out), you're not going to make much of a contribution to pollutants, especially since the car isn't driven a lot.
Actually, the only times the EGR valve is closed is at idle and WOT. some engines will spark knock when the EGR isn't working. Particularly Older Fords.
Back to Top
dodgemahal View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Dec/11/2015
Location: Illinois
Status: Offline
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dodgemahal Quote  Post ReplyReply Direct Link To This Post Posted: Oct/03/2017 at 9:14am
YES!!!! I am getting some possible spark knock and that is what led me to investigate this EGR system. I'm going to try some higher octane gas and when time allows, will see why it(egr) isn't working and fix the problem.

GZ, I didn't see a cto on Rock Auto. Haven't checked other sources yet.....I'll wait to see if I need one.
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.141 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or