Re: [alfa] 164 fuel pressure check - leaking?

[hagen_jason@xxxxxxxxxxx]

Apparently there is a small section of fuel hose in the fuel tank that runs between the pump the the solid tubing coming out of the tank.

If fuel pressure drops after turning off the vehicle, it means there is a leak in this hose or line (or another hose outside the tank which would be easier to spot).  The only other culprit it the pressure regulator.

My car, though it has the starting problem, holds pressure very consistently (though I will check again another 1/2 dozen times!).

--
Jason Hagen
Chicago, IL
'73 Spider
'95 164Q


> I check my 94 164LS fuel pressure at fuel delivery inlet of damper.  
> 
> Right after shutdown engine, the pressure dropped quickly from 38psi to
> below 10psi.  
> 
> Tried it again the second time and it dropped to almost zero.
> 
> Tried it the third time, this time it held at 38spi but gradually increase
> to 42psi, probably of hot engine.
> 
> Now it holds pressure well.   What is this erratic behavior?  
> 
>  
> 
> What would be wrong if fuel pressure doesn't hold?   
> 
> Pressure regulator or is there a check valve in fuel pump?
> 
>  
> 
> Karl 
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