CIS not getting fuel to fuel filter...check valve?

On an '82 model 244 with CIS, I'm not getting fuel pumped up to the
fuel filter with the present filter, check valve, accumulator. I
checked to make sure that the line was clear and it is.

Just for fun, I put the pump, accumulator, check valve, from a running
245 of the same year and now I'm getting fuel.

The original pump in the car works and fuel squirts out of the exit of
the accumulator, but when it is hooked up in the car, it is unable to
pump the fuel up to the filter.

My question is this:

Do these fuel pumps either "work or don't work" so to speak? I believe
that is the case, but I'm not sure and don't wan't to go out and buy
another pump just to still have the same problem. My gut feeling is
that the problem is the fuel check valve, but I'm not exactly sure how
to check the thing or the accumulator.

Any help would be appreciated.

Thanks!

 

Sounds like the pump is pumping, but not putting out sufficient
pressure.

The pump is supposed to put out surprisingly high pressure.

I would suspect the pump, and to test it, substitute the known good
pump for the suspect one and see if it works.

If it works: voila', bad fuel pump.

 

I swapped the pump/check valve/regulator assembly from a car that runs
and had plenty of pressure. I'm want to know how to tell which one of
the three components is bad.

 

If fuel comes out the accumulator when the line up to the engine is
disconnected
And if a different pump/valve/accumulator combo will pump fuel through
the existing line
Then the original pump is very weak - the difference is it will pump at
zero pressure (disconnected) but when connected there's a regulator in
the fuel distributor that holds pressure at 65 psi - a pressure that
your original pump can no longer generate.

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

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

 

Almost certainly the pump, the CIS pump produces around 80 psi, there's
an internal overpressure release valve but I don't think you can get to
it to repair it.