I have an 86 FB with the 2.8L with a problem that I can't seem to figure out so I thought I would post it here. When I check the timing with the bypass wire diconnected the timing will jump from around 0* up to about 30* without me touching anything. The idle also fluctuates with the timing. The only thing I haven't changed is the ign. module. Does anyne know if this could cause these symptoms?