My personal experience was a tire with a broken belt. There are other reasons but your description is vague.
The Buick Park Avenue Started In 1991
disc
10w30
3
The Buick Park Avenue nameplate was first used in 1977 on a model of Buick Electra, but did not exist as a standalone model until 1991, when it replaced the Electra.
what are you takling about? no such thing!
5 QTS
Check out Crutchfield.com
fuel pessure test
.060"
You dont. The computer does it.
Inside the fuel tank.