2002 grand cherokee 4.7 rough idle/ even worse in drive

[tgea1]

Idle seems to flucuate when in park and it gets worse when in drive especially sitting at a stoplight. replaced the TPS and the Idle speed motor and that changed nothing. any suggestions before I put it in the shop again...

[xj31]

is it the H.O. 4.7?those tend to idle a little on the rough side.

[jmmyers29]

I'm having the same issue with my 02 Jeep w/4.7. I have 60,000 miles on it. Would a simple tune-up do the trick? -Thanks

[glennco1]

There is a TSB for 4.7L jeeps on this very issue. Check it out here:

http://www.wjjeeps.com/tsb_list.htm#1804504