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Old 1st December 2012 | 09:40
  #12 (permalink)  
mad_jock
 
Joined: May 2001
Posts: 10,804
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XA, most modern (fuel injected) cars use a high pressure fuel pump located in the fuel tank. This pushes fuel up the system, in excess, with a bleed return back to the tank, normally through a 3 bar regulator. This is far less likely to allow fuel vapour lock to form than does pulling it via a mechanical suction pump, as most carburettor equipped cars used to do.
Which is why you must turn the ignition off if you have a crash. If the fuel line is rupture you can get loads of fuel outside the relative safety of the fuel tank rather quickly
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