[urq] Fuel Pump Noise

[AudiQtroCp at aol.com]

Hey guys, another question from a guy with a recently-added UrQ to the  
stable.
 
Running gear is top notch 1990 MC2 conversion.
 
The car has developed a random cut-out recently, especially in the  vegas 
heat.
 
It acts purely like a fuel related cut, but its not RPM dependant or boost  
related.
 
Hell, Im not even sure it aint just good ol vapor lock.  (injector  cooling 
fan IS operable)
 
The fuel pump is relayed and gets direct power from the battery.
 
The car sat for several months before I picked it up a few weeks ago and  the 
owner added some super whamadyne fuel system cleaner to the gas before I got  
it, he said he only ran a tank of gas thru it so far.  He warned me that it  
was going to need a set of fuel filters within the next couple tanks - I  
replaced them as soon as I got the car to Vegas ( i ran 3 tanks thru it on the  
drive).
 
The car has excellent vacuum - no leaks.
 
The fuel pump is a bit noisey, but not like its about to die - however  every 
once in a while I hear what sounds like cavitation at the pump.  Is  this a 
definite sign of a pad pump?  Is there a pickup in the tank that  could be 
clogged ( and is it serviceable ) ?
 
Thanks again, and open to suggestions.
 
sean