OB_Velociraptor
Registered
After the very helpful responses about the throttle body sync(thanks all!), I decided to take a look at the fuel pump to see if anything was amiss. The small o-ring that fits in the fuel filter retainer plate was halfway up the side of the tube it fits into and was certainly not sealing anything. I'm not certain what effect this would have on performance, but after repair of this problem the old zip was back. It must've been messed up during the recall work on the pump. For those of you with the shop manual the o-ring is shown on the bottom right of page 4-55. Inspection of the small filter between the pump and pressure regulator showed no blockage. Screen looked good as new.