Re: O.T.--Calling 6.5 diesel experts

Posted by Bob on December 07, 2006 at 08:54:28 from (69.178.229.154):

In Reply to: Re: O.T.--Calling 6.5 diesel experts posted by hilario fernandez on December 07, 2006 at 08:25:02:

The shutdown solenoid closes off fuel to the injection pump when the key is turned "OFF", causing shutdown.

Of course the other solenoid, the FUEL SOLENOID also ceases to be "triggered" with the key "OFF", also. The fuel solenoid is driven by the PMD, which commands the FUEL SOLENOID CLOSED for the start of EACH AND EVERY injection cycle, and allows it to open when the desired amount of fuel has been injected... controlled by the desired fuel rate, as determined by the powertrain 'puter.

So, the SHUTDOWN SOLENOID opens and closes only as the key is switched "ON" and "OFF", and the FUEL SOLENOID cycles at EVERY injection event, 4000 times a minute for every 1000 engine RPM's.

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