my rpm,s bouncing around on my 99 dodge cummins well i did change the TPS sensor and crank sensor it did not solve the problem would you have any idea of what i should check next other then that truck runs great if i hit the throttle pettle while the rpm,s bounce up and down it will stop injectors are only a year old 100hp bd injectors

 

I have the same problem and Ive come to just accept that its normal. The only way I could get them to stop bouncing was to use the smarty and set the injector duration to level 6. Hope this helps bud

 

got it fixed changed tps