03 6.0 cclb 4x4. ..... I have changed plugs, wires and three coils. Hooked up to diag while running and checked injector pulse. Still can't resolve a 10 sec + are - 2 sec skip at idle. It doesn't show it self while driving are pulling a load. Anyone have a clue ---- I can check out.

 

It only does it at idle?

 

Yep.. From what I can tell. Driving/Ideling with the diag scanning injector pulse and fuel related sensors shows no issues. Electrical components/sensors, no codes. Need to change gas filter - but if rail psi was the issue it wouldn't be a intermittent skip. Mods..3"lift, CA, 4:56 gear up for 305 tires, air bags nothing electrical are tune- yet. Need to clear skip before tune.