I am the original owner.
Always use Shell/Exxon/Texaco gas 89 octane.
Always lived in Houston, TX.

After a few years of the problem, in 2010 I allowed the Honda Dealer to replace both all 6 coils and all 6 spark plugs. But the problem recurrs.

Other than this approximate 1 to 2 week period that occurs about every year (sometimes summer, sometimes winter), the car runs very well. Even "during" this 1 to 2 week period, after each warm start difficulty, I only need to nurse it down the road for about 2 minutes before it runs well again (I just dare not turn it off because I'll have the warm start difficulty of all the cylinder misfiring again).

Any thoughts you can offer?

 

Just me going out on a limb here. There are several of these (6th gen v6's) that had issues with vapor lock from the fuel lines. There is a TSB or something sim floating around. It talks about cars in the North east but I can tell you I've seen/read about cars NOT from that area that have the same issue......specially when there is a change in the blend of gas - winter blend vs regular.