On 3/2/2012 11:20 AM, Ignoramus22470 wrote:
A followup. Very embarrassing and very typical.

What was wrong was that I mixed up the supply and return lines, so the
fuel pump was pumping into the return line.

The truck now runs great and I have a foot in my mouth.

So just out of curiosity what was the original fundamental problem
(presuming you didn't receive the truck w/ the lines reversed)?

I'm at least somewhat surprised could do that--on the GM trucks I have
here the lines aren't interchangeable--the feed line is larger than
return, typically.

--