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
BenK wrote:
My controls DB hairs raised reading that there are *TWO* regulators
and/or relief valves to the return?!?!?
A huge tell-tale that they had a problem, chased it and solved it to
some level of confidence with the addition of another set of regulators/valves
Not good engineering, IMHO...worse if there is a 3rd set.
There is still the same regulator on the pump that there has always been, and they swapped the relief valve for a regulator. My guess is to allow more precise control. The Relief valve is simply a spring and is either all or nothing. The regulator would allow better control.
From what I have been told the CP4 pumps on these trucks have a lot less capacity then the CP3s did.
