First, MANY thanks to those of you who have contributed your experience
to this enterprise. We've worked on the car unsteadily and it is closer
to proper running but we have hit a stump.

We checked the manifold air pressure sensor and found that it has a very slow
leak. Figuring that no leak is better than some leak, we examined the others
we have around. Found 2 others that don't leak. One has a hole drilled through
the epoxy and the metal cap so you can see the adjusting screw inside. The
other one has no epoxy and the metal cap is painted black, so it looks like both
have been adjusted. No telling how much. We installed the one with the black
cap with a new hose.

I pulled out the cold start injector, installed another one to plug the hole,
put the connected but removed one in a bucket and cranked the engine. The
engine started but the injector didn't inject. Figuring I had more important
tests to perform, I clamped the hose, took off the cold start injector and
replaced it with a pressure gauge. Turned on the ignition and the pressure
came up to about 30# (gauge not accurately divided in that range, it's a
compression tester) so we started the car. It ran for a while but the fuel
pressure started going down. The engine continued to run about the same
until the pressure got near zero at which time the engine died. Turned ignition
off and back on and the pressure came back up. Started the engine and it ran
for about a minute while the pressure went down. After a few more tries it
wouldn't come up again. Power to the pump but wouldn't run. Rapped on it
sharply and it started again but only ran about another minute.

Found another pump and installed it and started the engine. Ran better, and
pressure came up and stayed up but when I looked in back there was a rapidly-
growing puddle of gasoline originating from the pump's electrical connection.
I tried two more pumps with the same result, so I have 3 that pump fine but
leak and one that doesn't leak but doesn't pump.

I plan to take this one apart and see if anything can be done for it (cleaning,
de-gumming, maybe installing the innards of a different pump, etc).

If anyone has a good, non-leaker D-jet pump at a bargain price I can furnish
several to use as cores!

But, WHY did the engine continue to run as the pressure declined? I would have
guessed that as the pressure got down to less than 20 psi it should have been
pretty lean but if I read the gauge right, I guess that it was running with
less than 10 psi, maybe even less than 5. Or maybe it was just burning fuel
accumulated in the ports and manifold????

Any ideas would be MORE than welcome. There are plenty things I know a LOT
more about than D-jet!

Thanks!
--
George Downs, Bartlesville, Oklahoma, Central US