Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
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Below are some links to the LML fuel system that Henry posted up.
The Piezo injectors are fired from 160-240v @20amps according to the GM documents. Thats a lot of juice and is why you see the orange harnesses now on the duramax.
There is also a valve used to keep pressure in the return system which is supposed to aid in firing the injectors.
The CP4 pump is timed so that its pulses match up with injection events.
A pressure regulator is still mounted on the pump but an additional one was added to control how much fuel is bled off into the return system from the high pressure system. Essentially replacing the fuel pressure relief valve.
Fuel Routing
parts listing
The Piezo injectors are fired from 160-240v @20amps according to the GM documents. Thats a lot of juice and is why you see the orange harnesses now on the duramax.
There is also a valve used to keep pressure in the return system which is supposed to aid in firing the injectors.
The CP4 pump is timed so that its pulses match up with injection events.
A pressure regulator is still mounted on the pump but an additional one was added to control how much fuel is bled off into the return system from the high pressure system. Essentially replacing the fuel pressure relief valve.
Fuel Routing
parts listing
