so here's the problem, every now and then i start up and it gets a huge miss-timing. cylinders miss fire and it reeks of fuel. the engine shakes. also when cruising the engine shake is minimal but under even the slightest acceleration, it shakes like no other.
ive replaced alot of the ignition parts b/c thats what it feels like it is since it only does it sometimes on startup.
new parts:
plugs(gapped to .35)
wires
dist cap and rotor
crankshaft position sensor
tps, also adjusted
iac
ignition control module
coil pack
ign switch

ive also checked the grounds aswell.
any kind of input would be appreciated. im mind blown and so is the mechanic

any of your renix ever do something similiar?

My 89 is currently acting the same way from time to time, very rough idle at start up and smells really rich then smooths out, I'm down to o2 sensor as i have cleaned or checked everything else. maybe happens 1 out of 5 starts, noticed drop in mpg though.