I'm at my wits end concerning my car and this gremlin. I have a 72 240z with a stock 2.4 4 speed and su carbs. The car will stop on me from time to time for a while now. I can always tell when it's about to happen because the car starts running really bad after deceleration on the freeway or similar circumstances. I have had the carbs adjusted/floats sync, new distributor, new fuel pump and spark plugs. The car acts as if it's running out of gas prior to it stopping and once it stops it will not fire back up for about 3 minutes it just cranks. Once it comes back to life, it runs as if it was flooded or misfiring. Any ideas concerning this?