I have a 06 GC 3.3 with31000. It seemed to idle rough on a warm start up so I reved it up a couple of times. when it hit 3000 rpm it wouldn't go any further and seemed to lope.I would think it could rev up more than 3000. I don't usually rev it up but I think something may not be working correctly.
Thanks for any info!
Tim

 

Tim

There is nothing wrong with tach. It is normal for the fuel to start cutting out with no load on the engine. But it maybe time for plus and wire set.