My 2000 Accord V6 EX auto sedan just turned 150K. It has been a very reliable vehicle. Other than routine maintenance, it hasn’t needed anything. However, something odd happens on a hot start. For example, I drive the car for 15 minutes or more. I turn it off, go inside for about 15 minutes (not long enough for the car to cool off completely), come out, start the car, and it runs like it is only firing on 3 cylinders. It runs REALLY BAD to the point I am worried something seriously wrong is going on. The idle bounces up to about 700, then drops to 200, then stalls. I can try to start it a few more times, but unless I give it significant throttle, it will continue to stall every time I start it. No CEL light. I have a code reader, but from what I understand, no CEL means no codes in memory, so I haven’t tried to read the codes. It tends to happen on cool nights (40-50F). It doesn’t happen all the time, but seems to be happening more and more. Since I can usually start it by giving it significant throttle, I haven’t really worried about it, but yesterday I had my 4 year old daughter in the car and I don’t want to be stranded somewhere with her in the car. Any ideas? I am pretty skilled at working on my vehicles. I had a 1986 Bronco with a 5.0L V8 EFI. I did everything to that engine except rebuild it. It ran for 250,000 before I sold it. Thanks for the help! BTW-I replaced the battery a few months ago. I think the alternator is going bad since I only see max 12.5V on hard idle, and it dips to 10.7V at night (with lights on, stopped at a traffic light).