Apr 24, 2010 #1 J Johnny Member Joined May 16, 2008 Messages 626 Reaction score 0 Points 16 2001 cherokee 4.0, i have a hard knock when starting the engine....
Apr 24, 2010 #2 J Jason Active member Joined May 11, 2008 Messages 1,240 Reaction score 0 Points 36 Check your oil.