Re: Need help with '88 Buick
take a look at the fuel pressure regulator. a bad one might bleed off pressure like that back to the tank, and will cause low fuel pressure when it's running.
hook up a fuel pressure gauge to the test port on the fuel rail (which is also where you are supposed to release pressure before unhooking any fuel lines).
with the key on, but engine off, it should be around 42 psi i think. at idle, it should have a little less than that.
if that checks out, shut the engine off and see if it holds any pressure. it should stay pressurized pretty much forever if the regulator is good, but if it's bad, the gauge will drop quickly and steadily down.
if you don't have a fuel pressure test gauge, tell your brother to buy you one for working on his car. a decent one will be in the $30 range.
i've done many odd jobs like that for friend in exchange for oddball tools i'll need down the road.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?