I have replaced the can synchronizer on our 96 4.0 Explorer. I have used the alignment tool that was supplied with the cam synchronizer. Explorer now studders when accelerating hard (half throttle from dead stop). Does the cam synchronizer have to be set like the timing on the vehicles that had distrubutor?

Here is what I did: To get to top dead center, I help my finger with a rag in place of the plug on cyl #1. Bump the motor over until the compressor had released with a poof. Rotated the motor by hand to tdc (0 degress on the balancer). Installed the cam synchronizer with tool bolted fast. Had to bump motor over to fininsh seating the synchronizer. Put hold down back on. Removed alignment tool and installed sensor. Finished putting drivers side wires back on coil pack, air intake tube back on, etc. Started motor. Motor idles smooth. I was playing in the drive way, under light (just enough to movefrom dead stop) acceleration runs fine. Under hard (half throttle from dead stop) acceleration, motor studders/stumbles (act like not fireing correctly / not enough / too much fuel).

I did have a little play (maybe 1 tooth on the gear) with either alignment tool(s) in place. I'm wordering if I loosen the clamp down bolt and given a slight turn if this would take care of my studdering problem.

Any help would be appreciated. I have read some of the posts on here but none have help with this problem