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Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 1522
Experience:  ASE Master Certification. GM World Class Certification
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06 Cadillac STS was running fine to the store came out

Customer Question

06 Cadillac STS was running fine to the store came out fifteen mins later and just cranks, went back a while later and cranks and almost starts.
Submitted: 11 months ago.
Category: Cadillac
Expert:  Jerry Newton replied 11 months ago.

The first thing I'd be checking is fuel pressure. Is this something you intend to fix yourself, or just looking for some ideas about what it might be?

Customer: replied 11 months ago.
This car doesn't have a fuel pressure regulator
Expert:  Jerry Newton replied 11 months ago.

No, not in the classic sense. It has a single fuel line that goes up to the engine, and the regulator is in the fuel pump assembly. My suspicion is that the fuel pump has failed, and a fuel pressure gauge would be necessary to test this. Is this something you intend to do yourself?