Been happening for two-three weeks now.

Maybe it's just conincidence but...

My gf has the civic for this time of the year and it's parked on the street outside her house. When she goes start the car during the middle of the day under a clear sky and sun, sometimes it won't start. It will crank but the car doesn't start. If it does start, sometimes it will die after just a few seconds (rpm needle drops).

If the car is in a shaded area or if the car is started in early morning or in the evening, the car will start with little problem.

Anyone think if this might be related to the temperature outside?

 

Check the plugs?

 

I think it's the main relay. Did a temporary solution fix and see what happens. Thanks

Spark plugs were changed about 8 months ago

 

The only real things that commonly cause that sort of symptom with that car are main relay or igniter. Sometimes main relays can be taken apart and fixed...