my 98 prelude has been having trouble starting up for the last few months. when i have a full tank of gas, the car takes a few turns to start the motor. but as the tank gets empty, the motor starts instantly, like it should. i've checked the feul injector gaskets, rail gaskets, feul line for leaks, feul filter, and the spark plugs (to see if leaky injector is causing flooded cylinder). i was going on a long trip a few days ago and filled up the tank, and when i went to start it up with still 3/4 tank, it started fine, and has ever since. whats going on with my car? i've checked all gaskets, filter and lines from the tank to the injectors.