First off let me say I am new to Hondas, but not cars. I bought a well used Civic from a co-worker and put a timing belt water pump, plugs, wires, cap and rotor along with all new brakes. I have driven the car about 3000 miles and it runs great. This is where it gets odd. Now that the weather is getting cold when I start it up in the morning it runs fine then shuts off after about 5 minutes, I let it sit for a few minutes it fires right back up and no problems the rest of the day. If I come home late for work around 10pm the next day when I leave in the morning it has no issues. Only when it sits for several hours. It is like when it is transitioning from open to closed loop. Has to be a sensor in my mind. Does not spitter just shuts off. I asked the guy I bought it from and he said "oh yeah it's done that for a while only when it gets cold though, just let it sit for a few minutes and it's fine". Any ideas?

 

Check main relay
check ignition switch

 

When it won't start, click the key to on but don't crank, watch for the CEL to cycle on for 2 seconds then go out, and listen for the fuel pump to prime. Also conduct a spark test. You have to do this during the time when it won't start.

 

I can definitely here the fuel pump I will do a spark test tomorrow