So I've got almost the opposite problem of that other thread -- mine runs nearly fine when warmed up (maybe a bit of uneven running), but it stumbles randomly and cuts out under part throttle cruising when cold, revs just suddenly drop to idle and won't rev no matter what I do with the pedal, then sometimes just dies outright though that could just be the idle condition as it doesn't idle well when cold and sometimes dies then as well. Sometimes I can drop the clutch while underway to get it running again, but I usually have to turn off the key and restart with a bit of throttle goosing, which is fun while on the road...
Could this still be the coil ballast resistor and/or fuel cutoff solenoid as well? It does tend to run on (dieseling) when I turn off the engine. When I checked the timing, I noticed the timing light seemed weak/sporadic but wasn't sure if that was just my light getting old/acting up. PO replaced the plugs, wires, cap and rotor several years ago (alas, they didn't note the mileage), and I've already tried new plugs.
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