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...
Forum Discussion
What bothers me is that the CP3 (gear pump with plunger / piston 2nd stage) is by all accounts, a typically reliable unit.
If the stage from fuel pump is added, really it is a 3 stage unit, though in some applications, there is not necessarily in tank fuel pump --- making it 2 stage.
Ballparking here... 100psi from in tank pump, then, 1,600 bars (23,200psi) max.
Suppose the gear pump raise it to 8,000 psi (easily done)?
That meant there is no known issue of fuel starvation in the critical 2nd stage.
My question is, why so few units failing if it is a major design flaw?
Is it certain units have parts not to spec?
Or is it reactivity? (and particular conditions that cause it) that do not afflict all units?
Why are we not getting much more widespread failures?
If the stage from fuel pump is added, really it is a 3 stage unit, though in some applications, there is not necessarily in tank fuel pump --- making it 2 stage.
Ballparking here... 100psi from in tank pump, then, 1,600 bars (23,200psi) max.
Suppose the gear pump raise it to 8,000 psi (easily done)?
That meant there is no known issue of fuel starvation in the critical 2nd stage.
My question is, why so few units failing if it is a major design flaw?
Is it certain units have parts not to spec?
Or is it reactivity? (and particular conditions that cause it) that do not afflict all units?
Why are we not getting much more widespread failures?
