I have a 1994 Sport Nautique with the early TB Injection. With Ignition on / Engine off Fuel Pressure at TBI Shrader Valve is zero. Fuel pumps both run for approx. 4 seconds when ignition is first switched on. If starter is engaged during this initial 4 second period engine starts and runs fine, fuel pressure is 13 when running. However, if starter engaged after first 4 seconds, engine will not start - no fuel pressure. Now that I know trick of starting imediately, starts and been consistent. But... this engine has a bad habit of not starting between skiers, and has left us stranded. I think I have not seen the last of this problem. Dealer said I should have fuel pressure whenever ignition is on. Do I have: a) worn out high pressure fuel pump/check valve, b) bad Engine Control Unit computer or c) no idea what I am doing? Any help here is greatly appreciated.