Losing spark on all cylinders around 2800 RPM?

sptjet90Reflexx

Petty Officer 1st Class
Joined
May 28, 2011
Messages
383
engine on muffs in driveway, remove throttle cable and manually advancing throttle. 2800 RPM los​e spark on all 4 cylinders and then some of them will randomly return but it will skip like crazy then it will throttle up past it but I still don't have spark on 1 or 3, what could cause this? I even tried putting the old trigger back on and it made no change.

New stator, trigger and switchbox all replaced at the same time. Also has a new fuel pump, carbs and lines cleaned and replaced.
 
Top