Crackling when engine is revved 2500-3000 rpms? -
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 > Crackling when engine is revved 2500-3000 rpms?

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineRubicon Express Suspensions from CCOR 706-207-4140Smittybilt Hard Tops @ Oconee Off-Road! 706-534-9955

Unread 03-05-2006, 11:57 PM   #1
Registered User
1999 WJ 
Join Date: Jan 2005
Location: Sandpoint, Idaho
Posts: 265
Crackling when engine is revved 2500-3000 rpms?

When I rev my engine up to around 3000 rpms in neutral, I hear a very noticeable cracking/backfiring noise. This "crackling" occurs when the rpms have peaked and are dropping back down to idle.

What could this be? Is this normal?

It's just been bugging me for quite some time now.


2012 WK2 :: V6
FatAlbert is offline   Reply With Quote
Unread 03-06-2006, 05:53 AM   #2
Registered User
1996 ZJ 
Join Date: Apr 2003
Location: Belle, WV
Posts: 4,930
It could be caused by just about anything.
Assuming the noise you describe has a combustion source, you may be hearing unburned fuel igniting as it is evacuated from the cylinders.
To help ensure your combustion system is working properly, clean the throttle body and combustion chamber, run some fuel injector cleaner through the tank, replace your O2 sensors, and do a compression test.
If the noise continues after that, check the timing to ensure your timing chain hasn't stretched too much.
Black 1996 5.2L ZJ Limited
Meerkat is offline   Reply With Quote
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.