Posted by jdemaris on January 05, 2011 at 13:18:23 from (67.142.130.37):
In Reply to: Re: ????????? posted by Bob on January 05, 2011 at 12:03:30:
To be technical, they ALL regulate the flow of fuel. One poppet per cylinder and a central, non-replaceable fuel regulator for CPI. The entire unit considered non-servicable. The CFSI that followed is. Each poppet has a check valve and spring, set to open at a preset pressure and certainly IS a regulator. Not not referred with the phrase "fuel pressure regulator."
With CPI, the poppet regulators need around 40 PSI to open and allow injection.
Main point of all this was to the orignal question about intermittent starting. These systems were known for causing symptoms of good running/no starting with minor drops in fuel pressure.
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