SOLVED!!! I can now get fuel to the engine. Won't run long - 1987 740

  • Thread starter Thread starter Jamie
  • Start date Start date
Not sure if you are interested at this point, but somewhere on
Turbobricks(know that is not as good as a URL) there is a see and tell on
how to replace the original main pump with a pump that eliminates the need
for the intank pump and if I recall correctly at a very favorable saving in
change compared to a replacement.

joe
Click to expand...

Thanks Joe, I might check that out - even if for my 240.

OK - Boneyard fuel pump is installed with new crush washers, the car
starts and runs VERY well again. Now, I lost my gauge - but that's
probably part of my wiring in the trunk. Otherwise, I'll be concerned.

But, the car runs well, no gas leaks - I'm happy for another day. $35
on the pump.

Jamie
 
Ratz... I almost jumped in on this thread/problem earlier, might have
saved you some grief.
When I was chasing a fuel problem in my '83 245, I started with the
obvious... fuse, relay, fuel filter, etc. Similar deal, Fired up after
installing the new relay and ran good enough to strand me on the way to
work.

The main pump was bad but as you've seen, it will still work
intermittently.

My first clue should have been, several times over the course of a
couple months the car would start second click as always.
While I'm idling, putting on seatbelt, checking mirrors, adjust radio,
etc., the motor would die. Just like someone switched it off.
Crank and crank and no fire. Sit and grumble about not having looked
into it the last time it happened, wait a while and it will fire up.
It finally quit for good $160.00 in towing from home.
Put a new pump in and all is well.
Click to expand...


The commutators in the motor wear down with time, eventually the
connection gets poor enough on some plates that the motor can stick
there and quit running. When my pump failed the motor still ran but it
wasn't pumping. I tore it apart and found the nubs on the armature that
drive the impeller had broken off but the commutator had a deep groove
worn in it by the brushes, it was just about to fail that way.
 
Jamie said:
...
I ran to the boneyard for lunch. I pulled 2 pumps off 2 cars in 10
minutes. Only 1 worked on the bench test, so I brought it home and
will hook it up after work.

I hope junkyard Volvos don't have AIDS. I cut myself every time I pull
parts.

jamie
Click to expand...

Tetanus might be an issue. You had a shot lately?
 
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