how to test for vacuum line leaks? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-29-2011, 12:11 PM   #1
Jeeper
 
rd-wrangler's Avatar
 
Join Date: Aug 2010
Location: Northern NJ
Posts: 489
how to test for vacuum line leaks?

i have a vacuum pressure tester and i was just wondering where actually should i put it in the vac line system? what vac line should i pull and put the tester in place?

just want to make sure before i start the testing procedure...

rd-wrangler is offline   Quote Quick Reply
Old 06-29-2011, 02:08 PM   #2
Jeeper
 
Abomination93's Avatar
 
Join Date: Feb 2010
Location: Beaver dam
Posts: 430
I normally use either a spray bottle or a can of starting fluid and start spraying along the lines. Either way the idle will drop for a short bit when u find the leak starting fluid is a bit safer for the engine but water still works. I'm not sure a vacuum hand pump will help u in locating the leak.

Abomination93 is offline   Quote Quick Reply
Old 06-29-2011, 02:24 PM   #3
Electrical Guy

WF Supporting Member
 
deathphoenix99's Avatar
 
Join Date: Apr 2010
Location: Houston, TX
Posts: 2,619
How do you know you have a vaccuum line leak? I mean, what are your symptoms or what's causing you to believe they are leaking. This will help us figure out what could be wrong.

But check all of the rubber hoses, if you touch them and your hands are black afterwards, the rubber hoses should be replaced.
__________________
2011 RCLB Silverado, It's got the power I need.
Wiring Diagrams!
-Phil-

QUOTE:Bugsbb
"You're just about to get a bump and poke back.."
deathphoenix99 is offline   Quote Quick Reply
Old 06-29-2011, 03:03 PM   #4
Jeeper
 
rd-wrangler's Avatar
 
Join Date: Aug 2010
Location: Northern NJ
Posts: 489
I have a low idle of 400-500 rpms and it shakes pretty bad. I have changed plugs, wire, rotor, cap, TPS, cleaned the IAC, and tested all the sensors that are used during the idle loop. Id figure I would start with checking vac lines, then fuel pressure, then change the fuel filter, clean throttle body and check the O2 sensor.
rd-wrangler is offline   Quote Quick Reply
Old 06-29-2011, 04:27 PM   #5
Electrical Guy

WF Supporting Member
 
deathphoenix99's Avatar
 
Join Date: Apr 2010
Location: Houston, TX
Posts: 2,619
What year vehicle is this? Vac lines normally will cause a higher idle when bad, not the other way around. I'd clean the thottle body first.
__________________
2011 RCLB Silverado, It's got the power I need.
Wiring Diagrams!
-Phil-

QUOTE:Bugsbb
"You're just about to get a bump and poke back.."
deathphoenix99 is offline   Quote Quick Reply
Old 06-29-2011, 04:37 PM   #6
Jeeper
 
rd-wrangler's Avatar
 
Join Date: Aug 2010
Location: Northern NJ
Posts: 489
95 2.5l
rd-wrangler is offline   Quote Quick Reply
Old 07-06-2011, 09:06 AM   #7
Jeeper
 
rd-wrangler's Avatar
 
Join Date: Aug 2010
Location: Northern NJ
Posts: 489
Well I have codes 22 and 23 after doing the OBD routine. I'm going to disconnect the battery during the day and when I leave work hook it back up to see if the codes stay. If so then I guess ill be buying a coolant sensor and air intake temp sensor. Pretty sure they are ok because when I tested these I had to have the engine running while they were unplugged...but you never know with jeeps

rd-wrangler is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2.5L engine fuel line question wolfen TJ Tech Forum 0 07-27-2010 05:55 PM
Fuel line nosho2 TJ Tech Forum 4 07-26-2010 02:37 PM
94 2.5 yj fuel line connector issue s_man692000 YJ Tech Forum 1 05-24-2010 04:14 PM
How to Roll Up Synthetic Winch Line ? nicolas-eric General Jeep Discussion 4 10-13-2009 07:23 PM
Urine test Scout Off-Topic 39 05-06-2007 10:24 AM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:20 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC