Think you are talking about 'pinking'. Check plug electrode gap is correct, check distributor advance/retard mechanism, reset/retard ignition timing
The 2011 Jeep Wrangler has a V6 engine.
The 2007 Jeep Wrangler has a V6 engine.
The 2012 Jeep Wrangler has a V6 engine.
The 2014 Jeep Wrangler has a V6 engine.
The 2010 Jeep Wrangler has a V6 engine.
The 2008 Jeep Wrangler has a V6 engine.
The 2009 Jeep Wrangler has a V6 engine.
The 2013 Jeep Wrangler has a V6 engine.
A 2008 Jeep Wrangler has a 3.8L V6 engine.
The 2003 Jeep Wrangler has an inline 4 engine.
The 2001 Jeep Wrangler has an inline 4 engine.
The 2006 Jeep Wrangler has an inline 4 engine.