Every once in a while when I go to start the car, I have to turn it over for almost 10 seconds- maybe longer- to get the car to start. My battery and starter are good- I'm thinking the fuel system. The car has 118xxx- my first inclination is to run fuel injector cleaner and change the fuel filter. Should I go that route, or change ignition coils? Or could it just be a dirty air filter? If anybody could tell me which of the three ingredients is likely the culprit I'd appreciate it.

'01 2.8Q 5-spd

 

Does it happen when the car has been driven relatively recently (not cold starts)? If so, it's probably the coolant temperature sensor.