My Cadillac starts an cuts off new fuel pump,filter,plugs,wires,no error codes new fuel regulator can anyone help

60

Asked by Nov 27, 2014 at 02:28 PM about the 1992 Cadillac DeVille Base Sedan

Question type: Maintenance & Repair

7 Answers

12,390

u are gonna have to start from square one. test the fuel pressure to see if it is within specs. even a new pump can be bad. wouldnt hurt to have the injectors tested.

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60

OK thanks my fuel pressure is 35 to 40 psi I will check injectors

60

Yes it has a chip on key its a v8 4.9liter

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12,390

ok, is 35-4o within specs for your car?

60

I check my manual and it suppose to be 45-50psi

12,390

ok low fuel pressure will definitely cause your car to do this. It could still be your pump even though it is new. it can also be the pressure regulator, but that is less common. if you can unhook the return line for the pressure regulator and the pressure comes up to spec, then the regulator is bad. or if you can remove the vac line and there is fuel in it the regulator is bad. You had a lot of work done too, and maybe somehow the fuel line got crimped or damaged that will cause low pressure.

60

OK I'm gonna check fuel lines because the regulator is new

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