Ok here we go. Did a swap about a month ago JDM b18c new clutch timing belt tensionr and so on. I DID not replace the spark plugs.but i have new ones installed

Now the car starts and runs but when i stop to turn it off it woult start back up. not sure what could be wrong.

Not sure if i should replace the fuel filter do you think it could be the problem. what do you think.

Also i was driving my car the other day ran fine. stopped to get something to drink turned the car on and let it ran. i got outside of my car to drink my drink for about 10 minutes not realizing the car was overheating. i put coolent in the overflow box. 2 days later its all gone. do you think im leaking coolant.