95 honda civic lx. why is it that when i come back to my car after shopping my car wont start at the turn of the key? i have to push down the gas pedal and slowly release it while turning the key to start the car. what could be causing me to have to start my car in this way? i had a full tune up done, spark plugs, fuel/air filter, fuel system throttle body cleaning etc and the battery was checked and is fine.