Angry Sparrow Syndrome? -
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 > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Angry Sparrow Syndrome?

WIN a Rough Country Forged Track Bar - ExtremeTerrain!FREE, FREE, FREE EVENT!! Save big on Lockers now till ApriJKS Grand Cherokee WJ, Adjustable Front Trackbar 1"-6

Unread 09-04-2003, 02:51 PM   #1
Registered User
Join Date: Feb 2003
Location: Hagerstown, MD
Posts: 247
Angry Sparrow Syndrome?

when i got in my 93' grand today i noticed a chirpping noise and a friend of mine said something about the "angry sparrow syndrome" something to do with the U joint. anyone know anything about this? and further more my cat. converter is ratteling. can cats "burn out". thanks for the help guys, lately it just seems to be one thing after another.


99' TJ Sport, 31inch MTR's, Lift Comming Soon
GrandRubicon155 is offline   Reply With Quote Quick reply to this message
Unread 09-04-2003, 09:09 PM   #2
Registered User
Join Date: Nov 2002
Location: Jefferson State
Posts: 814
Angry sparrow - u-joints? Dunno, that's a new one on me.

Yup, cats can burn out, they can also rattle forever, they can also collapse internally and choke off airflow so that power is reduced - sometimes to the point of engine not running above idle, or not running at all. A partial blockage can often be identified by a loss of power under WOT, with a "whooshing" sound from the exhaust.
1995 5.2 ZJ Sold... but still in the family
Stocker is offline   Reply With Quote Quick reply to this message
Unread 09-05-2003, 08:43 AM   #3
Registered User
Join Date: Jul 2003
Location: Naperville
Posts: 55
Yes Catalytic Converters are basically ceramic honeycomb in some configuration. As it breaks up, the pieces rattle around inside like coins in a can.
techie is offline   Reply With Quote Quick reply to this message
Unread 09-05-2003, 09:28 AM   #4
Texas ZJ1
Jeep Jedi Master
Texas ZJ1's Avatar
1994 ZJ 
Join Date: Mar 2003
Location: Omaha, NE
Posts: 20,261
Heck yeah they can burn out. I replaced mine a couple of years ago.

00 4.7 Laredo...KYB gas shocks, ADDCO rear sway bar and Firestone Destination tires.

08 Z71 Suburban, front leveling kit with rear spacers. 285/65 18s Nitto TerraGrappler G2s

94 5.9 Laredo 6.5 RE lift with 35 Maxxis Bighorns
and 33 Bridgestone Duelers
Detroit and true trac
Red Jeep Club Member
Texas Jeep Owner #6
USN Jeep Club #4

For your performance needs:
Texas ZJ1 is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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. is not in any way associated with Jeep or the Chrysler Corp.