Comanche sounds like a diesel - 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 Cherokee & Comanche Forums > MJ Comanche Technical Forum > Comanche sounds like a diesel

Currie Antirock, Currectlync & Lift Kits on Sale!Oconee Off-Road Free Shipping Lifts Tires Bumpers Tops andIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Unread 05-13-2008, 06:07 PM   #1
talthaus
Registered User
1991 MJ Comanche 
 
Join Date: May 2008
Location: florida
Posts: 2
Comanche sounds like a diesel

Somebody please give me any ideal as to why under heavy acceleration my 4.0 inline 6, 1991 comanche sounds like a diesel truck when I punch it. It has 200K+ miles, just replaced the water pump and the belt it good and tight. I'm at a loss to figure this one out, any help is appreciated. Thanks

talthaus is offline   Reply With Quote Quick reply to this message
Unread 05-13-2008, 07:25 PM   #2
maddzz
Registered User
1989 MJ Comanche 
 
Join Date: Nov 2007
Location: Rhode Island
Posts: 277
Not sure what you mean by sounds like a diesel. Is it just loud. Head over to comancheclub.com Better chance of some help
maddzz is offline   Reply With Quote Quick reply to this message
Unread 05-14-2008, 08:12 AM   #3
rworks
Registered User
 
Join Date: May 2007
Location: Kathleen, GA
Posts: 90
Are we talking "clatter"? Could be a sticky lifter.
rworks is offline   Reply With Quote Quick reply to this message
Unread 05-14-2008, 10:29 AM   #4
SuperWade2
More Money than Brains
 
SuperWade2's Avatar
1999 TJ Wrangler 
 
Join Date: Jun 2005
Location: Scotts Valley, CA
Posts: 3,772
My lifters are all really noisy too... sounds like a Mini-Diesel too...

Not much I've done has had any effect... will be rebuilding at some point in the future...
__________________
Get your personalized Ammo Can Magnet Labels HERE
1999 TJ
1998 ZJ 5.9L
2014 WK2 Overland 5.7L
SuperWade2 is offline   Reply With Quote Quick reply to this message
Unread 05-14-2008, 12:17 PM   #5
Pete M
Registered User
1988 MJ Comanche 
 
Join Date: Sep 2005
Location: S/E Michigan
Posts: 1,837
Could be pinging maybe? H.O. engines don't have a knock sensor. Try throwing an octane booster in the tank.
Jeep on!
--Pete
__________________
-88 MJ; 4.0L, ex-2wd, TJ ax15/231, 78 Ford D44 w/spool, 9" w/posi, 33" trXus MTs, custom roll-bar/bumpers/etc.
Also an 86 MJ Metric ton and 2 '90 MJs
Projects/wheelin' pics: picturetrail.com/petermontie
My email: petermontie@hotmail.com
ComancheClub.com/forums
Pete M is offline   Reply With Quote Quick reply to this message
Unread 05-15-2008, 06:45 AM   #6
talthaus
Registered User
1991 MJ Comanche 
 
Join Date: May 2008
Location: florida
Posts: 2
Thanks to all that replied

Thanks guys, I appreciate your replies, I finally figured it out. I was a little low on oil and the oil light flickered just before shifting at red line, added oil, noise went bye bye. The noise sounded like a diesel sitting at idol the kind of have that metalic rattle I don't know how else to describe it. The noise wouldn't be all the way through exceleration just at the end of a shift point under wide open throttle. During light exceleration it would not do it at all.
Take care!!
talthaus is offline   Reply With Quote Quick reply to this message
Unread 05-15-2008, 09:44 AM   #7
88XJSport
Registered User
1988 XJ Cherokee 
 
Join Date: Jul 2005
Location: Michigan
Posts: 4,324
Sounds like you could use a gauge cluster swap so you can monitor you oil with a PSI gauge...

Either way, congrats on getting it figured out.
88XJSport 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


Suggested Threads





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.