If it's a stock bosch pump, it's more likely the regulator since the
stock pumps are vane-roller style and really shouldn't leak back very
much if at all. If you think it could be a stuck injector, go for
start and then kill it quick and read the plugs should be telltale if
one is stuck.

Jim Akiba

On Mon, Sep 8, 2008 at 8:46 PM, Mike S <mikes@flatsurface.com> wrote:
> At 08:13 PM 9/8/2008, B.J.R. wrote...
>>
>> As soon as the cranking of the motor stops, (ignition coil disabled)
>> the pressure drops rapidly.
>> A leaking injector?
>
> If it starts OK, probably not - that would flood a cylinder.
>
>> it's not the cold start valve leaking. or can the pressure back out
>> the pump??
>
> Pump or regulator.
>