Originally Posted by fixitnowlt
Since you have done all that you may as well try a coil pack on it. The coils will break down over time and cause a misfire.
FYI- If it misses at idle and smoothes out whe you crack the throttle, there is most likely carbon built up on the intake valve for that cylinder. This can be verified with a compression test. This would require the heads to be removed to remove the valves and clean them.
The diagnostic test says this happens at the first 100 rpm's ?.
There is a single coil pack on the van, can a single coil pack going bad effect only one cylinder.
Could it be a bad crank position sensor?