My car starts perfectly but there is a constant ticking when idling, and it gets worse when giving it gas. Once the engine get warm it idles very bad and stalls, but starts perfect again but stalls after a short time. What could be wrong with my car?
I just adjusted my header gasket took a look at my valves, which looked good, and I also adjusted my valves, exhaust valves at 0,25mm(0,010') and intake valves 0,20mm(0,008')

Was it happening before you did these adjustments?

How is the oil pressure?

Adjusting valves is a "fine tuning" procedure. What caused you to do it on such a new Civic? I've seen Civics with 130,000 miles on them that didn't need to have the valves adjusted. I would check the adjustments again, when the engine is "stone cold." Just remember, it's better to hear them than smell them. Be sure not to adjust the exhaust valves too tight; otherwise, they can burn or crack.