I disconnected from the fuel filter (the large metal filter between the
pump and the injectors) the hose which connects the filter to the fuel pump
in order to test the fuel delivery rate of the fuel pump.  I found that rate
to be quite adequate.  While conducting this test I was forced to plug the
open end of the hose coming from the injectors because fuel was siphoning
through the system.  My question: Would a properly functioning fuel pressure
regulator allow the reverse flow of fuel through the system at a rate to
sufficient to cause this siphoning action?  If not, can this be construed as
a sign of a defective fuel pressure regulator?  I know this reversed flow was
not caused by accumulated pressure in the tank because I removed the gas cap
so as to allow any pressure to vent.  Would it now be appropriate to test the
operation of the regulator by applying a test gauge to the line?  I am
searching for the cause of an intermittent dying condition not caused by
electrical malfunction.  Any help would be greatly appreciated.

Rico Dagastino
Munford, TN
84 GL "Thing 1"
87 GL "Thing 2"