I have a 97 prelude sh and every now and then it wont sart. The battery is fine and the fuel pump works. Sometimes I get in the car in the morning crank it and it starts right up (the cranking time is a little long too)....

I'll drive it somewhere and turn it off, go do whatever i was gonna do, come back, try to start it and nothing happens, not even a crank, just a click noise but no crank. This happens every now and then, could i have a bad/failing starter motor cuz sometimes it starts and sometimes it doesnt. I also read that the key to the car has a chip in it that sends a signal to the ingnition switch when you go to crank. Could i have a malfunctioning key signal? Also, and your gonna think im an idiot but.... I've only had this car for like 2 weeks and I was completely un-aware that the prelude is supposd to run on premium fuel, so i put regular in it once, and that tank of gas isnt finnished yet but now that i know..could this be the reason why it wont start sometimes. Any Ideas?

thanx