I had to go pick up my wife to be at work today because her car wouldn't start. This is not the first time it has happened. Car has been well maintained and has around 240,000 miles. So far in the last six months I have replace plugs, wires, timing belt, distributor with new o-ring and cap, fuel pump, and much more not related to engine. Could it be the main relay or ICM as I have read on other posts? Is there a way to pinpoint which it could be as to one or the other? The car had a stalling and starting problem around one to two months ago (or about 2,000 miles) and we replaced the distributor which seemed to fix all problems until now.

Thanks

If it starts in the cool of the morning, but it won't in the heat of the day, I'd replace the main relay. This is reinforced by the fact that you recently replaced the distributor, which I assume was brand new. Hopefully, it was a genune Honda distributor. Regardless, it should have come with a new ICM and coil.