[DML] Re: Fuel pressure/accumulator question

["Dave Swingle" <swingle@xxxxxxxxxxx>]

Good analysis. 

There are a couple of easy tests for the accumulator - 

Clamp off (vice grips) the one hose that comes off the end of the 
accumulator by itself. This is the low side relief. If it is leaking 
badly internally, this will fix the pressure problem. You will still 
have a hot start issue, but the fuel pump pressure will not be able 
to bleed off back to the tank and should build up quicker. 

An alternative or second test to this is to disconnect this same hose 
from the accumulator, and then clamp it off. Put a short extension 
hose on the accumulator and direct it into a jar. Jump the RPM relay 
to activate the fuel pump. If you get more than a 1/4 cup or so of 
fuel out of the accumulator (you should expect some as it 
compresses), it's leaking internally. 

Dave Swingle


 --- In dmcnews@xxxxxxxxxxxxxxx, "valleyrat12" <valleyrat12@...> 
wrote:
>
> If the accumulator is bad and leaking back into the return line 
would 
> it take longer for the pump to reach operating pressure?  This 
would 
> constitute a fuel leak in the system except for that it does not 
vent 
> out of the system correct? 
> 
> Example:
> 
> Assume the accumulator is good and not leaking back into the return 
> line, if I put a tee in the fuel line right after the fuel pump and 
> connected a hose to it and ran it back into the fuel tank that 
would 
> be the same as having a bad accumulator. This would obviously cause 
> fuel pressure to be low or the pump would have more difficulty 
> maintaining pressure.
> 
> Are these assumptions correct or misguided?
> 
> Nathan
> 2277
>








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