Evap canister - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 09-28-2000, 11:29 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Evap canister

I was wondering if there is a way to temporarily disable or bypass the evap can. Mine is purging while idling---- wrecking havoc with the idle. Am getting a new one but it is a dealer only part $70 and special order (ie. pay upfront--get the part sometime next week). was wondering if you could just pull the purge line and plug it without causing other problems. Any help appreciated.

Ed
89 YJ 4.2 Carter bbd auto tranny

Sponsored Links
Advertisement
 
post #2 of (permalink) Old 09-29-2000, 01:10 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Evap canister

Cap both the small VACUUM lines that go to the cap on top of the canister. Leave on the larger lines that go to the carb and tank.

post #3 of (permalink) Old 09-29-2000, 09:36 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Evap canister

I have always wondered how this thing is supposed to work. Can either CJDave or TeamRush or other Guru give a short lesson in evap can theory?

Thanks. Turtle

"Pleased to meet you, hope you guess my name."
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 09-29-2000, 09:52 AM
Keyboard Implanted
 
Join Date: Sep 1999
Location: Southeast Iowa
Posts: 6,394
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Evap canister

[img]/wwwthreads_images/icons/blush.gif[/img] Everything that I know about emmissions I learned from CJ-8/5.2Mag.....[img]/wwwthreads_images/icons/blush.gif[/img] Marty was a valuable source of good information when we re-smogged our illegal, smogless, hot-rod CJ 304 V8. As I understand it, the charcoal in the cannister captures the fumes from the pool of gasoline in the fuel tank and from the pool of gasoline in the carburetor when your Jeep is sitting there not running and especially when the heat soak from a hard run is warming up the carb and the fuel tank now that the breeze from driving has stopped, and the heat is causing the gasoline to overheat and "gas off" like crazy. The fumes from the two pools of gasoline accumulate in the charcoal pack, and therefore don't fill up the garage and annoy your Jeepchick. ["Owwwww.....your Jeep STINKS!"[img]/wwwthreads_images/icons/mad.gif[/img]] When the engine is restarted, the purge valve receives a signal from the vacuum advance line, and that lifts the valve seat and allows intake manifold vacuum from the engine to suck the accumulated fumes out of the charcoal pack, mix them with the intake mixture, and make everybody oh so happy once again.[img]/wwwthreads_images/icons/smile.gif[/img] So you can see, that the cannister does not retard performance and is actually a benefit. THERE IS ONE CAUTION......cannisters CAN cough up charcoal into the vacuum system, so a fuel filter in the purge line is a darn good insurance policy. A clear filter would even be better so you can SEE if it is happening.[img]/wwwthreads_images/icons/smile.gif[/img]Oops!..[img]/wwwthreads_images/icons/blush.gif[/img]....that should have been a fuel filter in the CARB BOWL VENT LINE......not the purge line.[img]/wwwthreads_images/icons/blush.gif[/img] The idea was to keep charcoal out of the carb bowl.[img]/wwwthreads_images/icons/crazy.gif[/img]

CJDave
Quadra-Tracs modified While-U-Wait by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img] Quadra-Trac Team.[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img]
CJDave is offline  
post #5 of (permalink) Old 09-29-2000, 10:42 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Evap canister

Very helpful. Thanks CJDave!

Turtle

"Pleased to meet you, hope you guess my name."
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome