What causes extended crank?
When an engine cranks for a long time before it starts, either spark or fuel is missing or weak and each has its own reasons. A bad coolant sensor, a bad throttle position sensor (TPS), a bad fuel pump or a plugged fuel filter can all cause a lean condition causing long cranking times.
How long should I leave my diesel plugged in?
One thing that most can agree on is that the maximum amount of time you should leave the engine block heater plugged in for is four hours. Any more and you’re just wasting electricity. You should also plan for plugging your vehicle in for at least two hours to ensure it will start.
What is the fuel rail pressure in a Cummins Engine?
Normal common-rail systems will operate at 5,000 psi at idle and can reach up to 30,000 psi at wide open throttle. In a Cummins engine, the injectors will not be actuated by the controller until the fuel rail pressure reaches the threshold.
When does the common rail pump start cranking?
This is how long it will take the common-rail pump to build fuel pressure to the “threshold.” The threshold for cranking is when the fuel rail pressure reaches around 5,000 psi. Normal common-rail systems will operate at 5,000 psi at idle and can reach up to 30,000 psi at wide open throttle.
What should rail pressure be on transit TDCi?
When i’m checking the live data for the rail pressure i also check it against battery voltage and rpm to make sure its refreshing itself in good time, as the others were updating and reading whats expected I assumed the rail pressure to be correct, oh I also swapped over the rail pressure sensor with another from a transit with perfect starting.
What causes low pressure in a diesel tank?
Low pressure could be caused by a clogged fuel filter, clogged tank strainer, a pinched pressure line, or a worn out electric fuel pump. Normal current draw is 6-9 amps. At very low temperatures diesel fuel can gel and restrict the filter or gum up the tank strainer.