Rpm bounces while moving

[Husky05]

Cm871 deleted, when I'm moving the rpm bounces 2 or 3 time then steady for 2 seconds, bounce again. When I put it in neutral, hold it at a rpm like 1400 does this. But when I'm parked, and hold it at 1400 it doesn't do this.

All fuel solenoids, shut off solenoid, pump, lift pump are new, I even took the IFSM off tore it apart cleaned it, checked and replaced gaskets/oring. Still doing this. Speed sensor is new. Replacing filters don't make difference.

4 injectors are new, 2 injectors are 130k miles.

Injector leak test passed, ran all test on insite all passed.

I am lost here.