hello so im new to this site i have come here to try and get some help with my car because im out of ideas.....so i have a 2001 accord lx that i just bought about a month ago and ive have nothing but problems the main problem is i have a misfire in cylinder one i fixed it the fist time and found that a piece of gasket got stuck in one of the valves so i have the valves reseated and check and they were fine again i also put all new top end gaskets and timing belt both tensioners and drive belt water pump changed oil and filter cap rotor spark plug wires and spark plugs and air filer then it was running fine then a day later it started again with the misfiring same think found out it was a bad spark plug but they were new so i bought a new one and it ran fine again then today it started to misfiring again so i think thats its the spark plug again but they are new but something is causing them to go bad and also i get bad gas mileage for the car about 260 per tank i should get more so im out of ideas of what can cause this so if anyone can help that would be grate the car runs good when it does run

 

Was gasket debris in #1 cylinder? Bent valve? Valves adjusted?