» » »

Cadillac Q&A

Ask Your Question

1997 Cadillac DeVille Question: Need to know what fuel pressure P.S.I. should be



dvddude, Camdenton, MO, December 22, 2009, 19:29

Hard to start in cold temps, checked FPR no leaking. Next step is to check the fuel pressure. ;What psi should it be at so I know if my fuel pump is weak. Thanks.

2 Answers
Flag This
  • Medium-star Best Answer
    December 26, 2009, 23:50

    For the 4.6L V8, the fuel pressure should be 48-55 psi.

    Flag This
  • Answer #2

    Visitor, April 10, 2010, 10:07

    I had this same problem and would kill my battery in winter. Dealership said I had to replace a part that keeps fuel pressure in the line @ $1,300. I found a solution to the problem...Turn key just to acc until the "ding, ding, ding" stops, then turn key off. Do this 3 times, then turn the engine over. works everytime, even in sub zero temps!

    Flag This