engine shakes ... like it is missing... rpms are around 750 warm.

When driven it seems to run better at higher rpms but there is a noticeable hesitation upon acceleration [behavior is like flooding out in a conventional engine- let up and nurse it and it gets better], if accelerate slowly there does not seem to be a problem with hesitation. Stumbling may be a better description than hesitation.

on/off ratio - testing #3 terminal on the diagnostic socket and ground with a Sears DMM with duty cycle gives me 59% plus or minus a half % at 2500 rpm and no change [absolutely no change] going to idle.

Thank you!

__________________
dloveless

1984 500 SEL [131K]-
1991 GMC Sierra 4X4 XC [162K]- War Pony.
2004 Jeep Liberty Limited [8k]- wife's sled- Belle.