The problem: once in a while after, the car has sat. It will have a rough idle (feels like it is breaking up) when I start it. It goes away by the time engine idle kicks down(30seconds or less). It does not return while driving. It does not do it if you restart in a few hours. It does not matter if it is hot or cold out.

I am performing the seafoam treatment, replacing the plugs and coils this weekend and i'll put di-elctric grease on all of my terminals. After reading threads The random misfire has me thinking other things though.Such as faulty connection, cam sensor, ICM or loss in fuel pressure/lazy pump.

Car was full when it did this last. SHELL 93oct. All of my filters are new.

It's a PITA because it doesn't stick around long enough
and it may go a week or two before it does it again.

Anything else I should check out or test would be a big help.

 

codes were P0300 and P0304,
Had a new coil on it. Found a dirty plug but I expect that was because the connection to the injector was mossy and the injector was messing up. It ran 60% better after I cleaned and put di-electric grease on the injector connection. It is perfect now that I have replaced all of the the plugs and coils and cleaned and greased all connections.