In Tank Fuel Pump 760/780 PRV

I have narrowed some of my 780 v6 hard start problem down to the
in-tank fuel pump. It doesn't seem to be working at all. When I
removed the cover plate in the trunk I see what looks like a large
round top that looks like it is screwed in. It doesn't have any nuts
holding it on like the one in the Haynes manual. Does it just screw
off?

 

If it's anything like the 740, yes it does screw off, it's very tight. Mark
the position of the sender assembly against the tank before you remove it so
you can get the sender back in the same position on reassembly. Beware of
dropping any sealing rings/gaskets into the tank as you remove it. You will
see the fuel pump attached to the sender unit as you withdraw the assembly.
I did this job about 6 months ago, the only problems i had were with the
clips that hold the pipes in. I ended up sawing them off, carefully! and
replacing them on reassembly. The pump can be tested once removed from the
tank. Needless to say, watch out for sparks and smokers!!!!!!

 

You need to spin that big plastic ring around the outside of the
sender. There's a special tool, of course, but you can do it with a
couple of prybars, prying in opposite directions 180 degrees from each
other.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)