Why does my Jeep feel like it is going over rumble strips when driving? on 2005 Jeep Liberty

Recently my Jeep has started to Shutter or feel like it is going over rumble stripes when I go a certain speed.

by in Warwick, MA on January 02, 2013
2 answers 5 comments
ANSWER by on January 02, 2013
Any transmission work done lately? Any fluid added?
COMMENT by on January 03, 2013
No nothing done recently. And it doesn't happen all the time. Worse going up hill.
COMMENT by on January 03, 2013
Service eng. light on? Has it ever had a good tune up? 4 or 6 cyl?
COMMENT by on January 03, 2013
No lights. NO work other then an oil change. 6 cylinder. Not to a good tune up. Should probably schedule..
COMMENT by on January 03, 2013
SOUNDS like an ignition coil(s) are breaking down or a bad plug boot(s) seek a good repair shop to check it out.
COMMENT by on January 03, 2013
Will do thanks
ANSWER by on January 02, 2013
maybe a tire is bad