My 1989 supra comp left me stranded again in the middle of the lake. I have put new starter, points, condenser, rotor, cap, battery, coil. I have started it out of the water and let it warm up. Shut it off and it cracks right off every time. I put it in the water and it won't start. The more it runs, the worse it gets. It was even cutting out a few times today. I also have it timed too. What am I missing. Tired of throwing money at it. And not sure I want to buy a new carb. Any help would be greatly appreciated.