We'll it wont start. Fuel preesure is bouncing between 2 - 3 bar. When under cranking it gose to about 5 bar. The car wont start unless i pull the fuel pump wire off, start if and put the wire back on. If it stalls between it starting and me putting the wire back on it will fire up straight way. Also it will start if its been stood for about 10 hours? What is causing this? Fuel pressure regulator??