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First things first, you need to check your fuel pressure AND flow. If you have damaged, or kinked fuel pipes you will have good pressure, but as you load the engine up (put your foot down) your flow is insufficient and you get lean misfire/overheating/cutting out. Bridge the fuel pump relay so you can run the pump without the engine. Get a large jug, suitable for catching fuel, open the fuel supply line and put the pump side in to your jug. Run the pump for 30 seconds, so long as the jug isn't filling up too fast. You should get a minimum of 2 litres of fuel, less and you have a restriction somewhere.
I bet it's the gas. After some time the gas will no longer be volatile enough to start the car. Try draining all the fuel and putting in some fresh gas. Remember, when you try to start it again you'll need to get the new gas through the pump and lines before it will start. Also, check the condition of the injectors. Old gas can start to break down and build up a film that could be on your injectors (or clog your fuel filter- better check that too). Hope this helps.
the pump should stop when it builds up to the correct pressure. if it continues to pump and you smell fuel then you probably have a fuel leek. normally fuel consumption will increase with a leek, even slightly.