Should all injectors fire when key is on truck not running?
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how is there rail pressure if the truck hasnt been started? not fully understanding what you are saying here
#10
Pressure will hold in the rail when the engine is shut down and the injector solenoid does not cycle. Keeps the potential for air getting into the system lower. When the key on sequence is detected the ECU cycles 1 injector on each bank.
When the cranking circuit is engaged there is a timeout that stops injectors cycling so the rail pressure can build. It takes 2 full engine revolutions to synch the cam and crank sensor so the CP-3 is spinning 3 times as many to build pressure. The purge routine is easily fit into the crank and synch before the engine actually fires.
When the cranking circuit is engaged there is a timeout that stops injectors cycling so the rail pressure can build. It takes 2 full engine revolutions to synch the cam and crank sensor so the CP-3 is spinning 3 times as many to build pressure. The purge routine is easily fit into the crank and synch before the engine actually fires.
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11B/11C (04-17-2016)