That's a good idea.
I've ordered the pressure release spring from the dealer. Mine looks
ok, but no harm in a new one. What about the plunger? Should that be
changed too?

Also...Can I use ANY pressure gauge rated for liquids? I have several
water
gauges hanging around.
The gauge moves up to zero when I turn on the ignition. Only after
starting does it move to the end of the scale.

The other mistake could be that I used the old brown wire coming
from the old sensor to connect to one of the new sensor tips.
Should I have run a new wire for that? Do the wires have to be connected
to a certain terminal on the sensor? I didn't see any markings on them,
but will look again this afternoon.

Thanks