The problem: When the car has been warmed up and is parked, upon returning to it (any time over 20 minutes) the engine experiences an extended crank situation. It always starts, but just takes some time.
The diagnosis: The fuel system is bleeding pressure back into the tank and allowing the fuel rail to boil the gasoline turning it into a vapor. A new fuel pump module (regulator included) is needed
The explanation: The fuel system is a returnless type system. Once the fuel is in the rail it needs to burn. In this case, the fuel pump/pressure regulator is bleeding the pressure back into the tank. Since the pressure is dropping in the rail, the boiling point of the fuel also drops. The fuel is then boiling and turning from a liquid to a gas. The extended crank is occuring because for a few seconds the injectors are spraying a gas which has a hard time combusting. Once the gas has been exhausted from the cylinder and the liquid gas begins to spray the engine starts and runs fine.
Негізгі бет Diagnosing a "Long Crank after Hoat Soak" on a 2007 Chrysler Pacifica
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