Ok, I have a 1989 Buick Riviera, 3.8L, 225k miles, I've noticed over the last few months that the car WOULDN'T start on the first try when cold, you could sit there and crank, and crank, and crank, and nothing. But right on the second attempt to crank, BAM it fired right up, almost like a jackrabbit start. Never noticed any rough idle, or stalling, but just yesterday, was at the car-wash, and there was some serious shaking at idle when I would rev the engine (note, at the car wash I only used the vacuum, so its not related to wet ignition) on the way home, there was serious hesitation, and after about 500 feet, car died completely. Attempts to re-start the car were unsuccesful, although there IS 1/4 tank of gas, and no " check engine" lights on. I am decent with car problem diagnosis, and good with repairs, so I am pretty sure it is something in the fuel system, but I can't pinpoint it. There is no fuel smell when attempting to start it, and the same when pumping the gas pedal. I am wondering if a dirty/clogged fuel filter would cause these symptoms I speak of, or if it HAS to be the pump?