What is the fuel rail pressure of a 2002 Cadillac SLS? Thank you.. Dee

Hi,

you might need to remove the power steering line as well as the fuel line in order to be able to swap the new fuel rail pressure sensor with the old one.

Thank you.

We assume you're in the USA if you don't state other wise and that the vehicle has 4.6l gas engine and not a diesel engine.

284-325 kPa
(41-47 psi)

Wow... Thats a lot of parts replacement for what may be a simple problem. The vehicle needs fuel and spark to start ( along with air and compression ).Is there spark from one or more spark plug wires when one is disconnected and held over a grounding point while the engine is cranked over? Is there fuel supply? Pressure to the fuel rail tested? Check the basics before you invest tons of money in an older vehicle

Not unless you want to cut a hole in the metal.
There is no access panel from the factory that I know of.

Check fuel filter.

should be in front of the drivers rear wheel mounted on the unibody rail near the fuel tank. should be pretty easy to spot once under the car.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If check engine light is on have it scanned at auto parts store .if no codes then could be low fuel pressure or a coil pack shutting down. Please rate my help

fuel pressure regulator or fuel pump could be your answer

Obtain a listing of your current service trouble codes which may point to the trouble.
More than likely you might want to consider either or both of these possibilities.
1. Replace your fuel filter.
2. Replace your fuel pressure regulator.
You can replace the above yourself if you have basic mechanical automotive skills and simple tools.

3. Least likey is that your fuel pump is working intermittently.
The service trouble codes would likely tell you that.

You might also want to check any fuses or wiring connectors.
Cadillac has fuses under the hood and in the rear trunk area. The Trunk area fuses are behind the carpeted padding behind the rear seat on the drivers side.


Both can be done yourself if your the least bit talented with tools and getting a tiny amount of grease on your hands.


Important: Only Work on these with the ignition turned off and cold. Otherwise fuel might leak on a hot item and cause a fire or explosion from the gasoline vapors.

When replacing both remember to release the fuel pressure first. Their is usually a valve at the end of the fuel rail with a covered scharder valve to do this. Just remove the cover, save in a safe place for reuse. Then with a small nail or similar item press in on the small pin to releive the pressure. ( It's similar to letting air out of a tire ) Make sure to have a rag and small cup to catch any fuel that leaks out. Once the pressure has been released fully, you can put the cover cap back on the schradrer valve. Now you can work on replacing the parts. Fuel pressure is restored when your done by simply restarting the engine.

The fuel filter is located on the bottom of the car frame rail just under the rear driver side car door.

The fuel pressure regulator is connected to the fuel rail lines toward the rear side of the engine manifold cover . If you have nylon rail fuels use the Fuel Pressuer Regulator for Nylon Fuel Rails. If you have Stainless Steel Fuel Rails use the Fuel Pressure Regulator for Stainless Steel Fuel Rails.

See the attached pictures.

Again, wipe up any spilled fuel and let vapors dissipate before restarting the car.

That is a broken or rusted fuel line. It only leaks when the fuel pump is running.