I am a newbie. I have a 2003 first gen 4.7 Durango, with only 60k on the clock. The idle is rough but the revs do not seem to fluctuate on the Tachometer and no stalling. On accelerating uphill it’s very lumpy and hesitates but pulls. The other day on a fairly steep climb from standing still it would barely go above 5 mph. The following morning when I indented to go to the service centre it was pulling ok but still have the rough idle. I have recently serviced, changes the plugs, oil and air cleaner etc, any ideas?

 

Welcome to DF! Moving this to the Durango section.