HI guys. Ive got a very slight almost unnoticeable hiccup, or skip, when the cars warming up. its never caused a CEL. its got a new MAFS, clean filter, ive cleaned the throttle body, new PCV. plugs are still in range. im not sure what to check from here and start wondering about coil packs and what not. the car shakes and vibrates at stop signs and stop lights now, never used to, but im not saying one happened with the other. opinion, advice or reference to proper prior threads appreciated. thanks again !

 

Perhaps check the compression and if all is well, entertain the idea of walnut blasting the intake. Everything you wrote is often what 250 owners experience when carbon buildup is a factor.

 

Seafoam works well too....for me, for the carbon buildup. Just pour in the tank at every oil change. Some people spray it into the intake (youtube has videos) which also works well. If I feel it hesitate before an oil change, I'll add a bottle on next fill up with gas. My 2008 is at 192,000 miles and never had the walnut blasting. Good luck!