MY 07 RAM150 AT A STOP THE RPM WILL MOVE UP AND DOWN AND ALL MUST STALL BUT GOS BACK TO NORMAL DRIVES GOOD ON HIGHWAY ETC. ONE THING IT MIGHT BE THE PCM RESTING BUT NO VEHICLE I BEEN IN HAS DONE THIS. THIS IS A FIRST
How many miles you got on the ticker and when was the last time you changed the plugs?
Try a few simple things first, like running some Seafoam through the fuel system and through the vacuum system. You can by Seafoam in liquid and spray bottle form. Clean the intake best you can with the spray. If you don't have any codes, disconnect the battery for 5 minutes, turn the ignition key on to discharge any residual static, reconnect the battery and test drive.
96K on vehicle all ready did plugs a about 85k did sea foam all ready spray(will try vacuum port ) will try bat. by the way a lifter tick all ready know which one just need lifter and spring tool to fix it thanks for replay will late you know