Misfire on cranking--hot starts only

[DoctorHawaii]

Something odd has just begun with my trusty '96 Tahoe (5.7): I get random misfires (1 in every 4 or 5 starts) when turning over to start--but ONLY when the engine is warm/hot. Then it cranks roughly before finally starting, but runs smooth as ever once started. If the engine is cold, it starts instantly. Again, no problems running at all. Any ideas?

 

[Nightflyer]

Hi,

Check your distributor and icm. Sometimes the icm could make strange things when it's warm/hot...

 

[DoctorHawaii]

Hi,

Check your distributor and icm. Sometimes the icm could make strange things when it's warm/hot...

Thanks for the suggestion. I put a new ICM in when I did the MPFI conversion a few years back, but it's a good thought. I think NAPA can do a bench test on it.
The odd thing is that she runs so perfectly once started, cold or hot, and no other issues at all (KOW!)