Were to look for vacuum leak? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > Were to look for vacuum leak?

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineNitro Gear Packages Now Available at Rockridge 4wdRIGID LED Light Blowout Sale - All Sizes, All Series, all

Reply
Unread 10-03-2013, 07:48 AM   #1
Jrboarder27
Registered User
2000 WJ 
 
Join Date: Oct 2011
Location: Boulder, Colorado
Posts: 1,030
So I suspect that I have a vacuum leak on my 2000 4.7 and I plan on getting some propane to help find it. I have what I think are the common symptoms, ( power loss, and rough idling at times) and I can here hissing at times while driving and idling. the problem is I can't hear or find it when i pop the hood, can any one point me in a direction.

Sent from my Galaxy S4 using JeepForum

Jrboarder27 is offline   Reply With Quote Quick reply to this message
Unread 10-03-2013, 08:38 AM   #2
grussell
Registered User
2001 WJ 
 
Join Date: May 2013
Location: Longmont, CO
Posts: 375
You could start by checking all of the vacuum lines coming out of the intake manifold and follow the vacuum hoses outward. I would bet that some of the hoses are dry and cracked, especially where thay mate up with a fitting or a T. On my 2001 I found several that were dry rotted and cracked on the end where they mounted on the fittings on the intake manifold.
__________________
2001 GC Laredo 4x4 Black
New 4.0 @ 149
grussell is offline   Reply With Quote Quick reply to this message
Unread 10-03-2013, 02:59 PM   #3
swkenobi
Registered User
2003 WJ 
 
Join Date: Jun 2009
Location: Colorado
Posts: 144
x2 on checking all the rubber vacuum lines coming out of the intake. There are several places that will be cracked, go to NAPA or whoever and the the 1/4 hose and replace all of them.
__________________
2003 Grand Cherokee Limited - Mostly Stock
swkenobi is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.