1999 Cadillac DeVille Q&A
1999 Cadillac DeVille Question: What should the normal psi on a 1999 cadillac deville when started up?
I assume you want to know the fuel pressure spec. With the ignition switch ON and the fuel pump running, the fuel pressure indicated by the fuel pressure gauge should be 333-376 kPa (48-55 psi). - milesauto