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      09-30-2010, 07:58 AM   #41
Mr. ///M3 RD
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Drives: C63 AMG & 280 SL on Weekends :
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Quote:
Originally Posted by teagueAMX View Post
The engine should not "crank" for more than a few seconds even if has sat unused for a while. Electronic fuel injection systems are fully pressurized, not like the old carburetor systems that needed a little extra gas if unused for a while: this is particularly true of direct injection systems. Hence the designation - HPFP.
Does the low pressure in tank fuel pump not pressurize the fuel system including the high pressure fuel pump the moment we press the start? or is the fuel system always pressurized?

If it is always pressurized, what if there is a system leak (let us say around the LPFP in the tank) would that not give a system alarm?
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