DSK wrote in message ...
Scout wrote:
Why would the return line cause it to lose fuel when you open the throttle?
If the purpose of the return line is to return unused fuel to the tank,
theoretically there is less fuel passing through it as you open the throttle
up.

Not necessarily. With a Detroit, yes, but other types of injector
systems do it differently. With our diesel (Ford Lehman) for example
there is almost no return at idle, the return flow seems to be
proportional to throttle setting (although it jumps when the load changes).

I find that very strange Doug. I have a Ford Bowman and have a very
strong return even at idle. Also have a very neat system to bleed the
system of air.
Its a tank mounted above the fuel system that has a capasity of the
whole fuel system. If I get air in the system it get trapped in this
tank above everything else. On top of the tank is a valve for purging
out all the air. It's great for removing all the air induced while
changing filters off shore in a rocking boat. My return is just as
strong at idle as it is at full throttle. I have a simms fuel pump
what do you have? Perhaps the Bowman conversation is just far better
and stouter than your lehman conversion.

Joe





A blocked return line could cause the engine to die but it would be more
likely to surge or be unresponsive to throttle first (disclaimer- I am
not an expert diesel mechanic and never played one on TV)

Your advice about checking the filter again even though its new is right
on. Say Bart do you have a vacuum gage on the filter outlet?

Fresh Breezes- Doug King