qkrawler

Been having problems for over a month now had a valve job done on my girls liberty as soon as we got it back it idles rough and sometimes stalls ... Any ideas are has anyone had this problem

ronjenx

Has it been looked at by the shop that did the valve job?

A common thing to do for your symptoms is inspect intake manifold, manifold gasket, and vacuum hoses.
There could be a crack in the manifold, bad gasket, or a damaged or disconnected vacuum line.

qkrawler

yea man took it back he says its fine wich its not... gona check the vaccum lines it goes away when you accelerate if thats any help

Morris4x4Center

The timing could be off a couple degrees as well. Take it back to the shop and have them look over everything.

A long time ago in place far far away, I once worked as a GM Tech. The Tech in the bay next to me had a come back with the same issue. Everyone had ideas and looked up and down. The "miss fire / rough idle" would clear up pass 1200 RPM. After finally plugging in a Tech2 (GM computer) we could see the timing was off. The car had been in there 2 weeks prior for a head gasket and come to find out the engines timing was slightly off. (THIS MIGHT NOT BE THE CASE, BUT IT IS AN IDEA)