Question about 2002 Cadillac Deville

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

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Your title says Deville but your question is about the SLS (Seville). If you are asking about the Seville (4.6L V8) with the Key on and the engine off you should have 41-47psi.

Posted on Oct 06, 2010

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Hi I am working on my 1993 cadillac seville sls 4.9l engine. It will not start


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

Nov 29, 2015 | Cadillac Cars & Trucks

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I am working on my 1993 cadillac seville sls with the 4.9l engine and am wondering if I can access the fuel pump threw the trunk ?


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

Nov 03, 2015 | Cadillac Cars & Trucks

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Where is the fuel filter located at on a 97 Cadillac Seville SLS Northstar engine


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.

Aug 15, 2015 | Cadillac Cars & Trucks

2 Answers

1999 cadillac Seville won't start only whrn spraying throttle body cleaner . I got spark and fuel on fuel rails with pressure what else y check


The fact that it will start with the throttle body cleaner means that the PCM is attempting to start the engine. The fact that there is fuel at the rail and there is pressure may be misleading. There may not be ENOUGH pressure at the rail to do the job. Check the fuel pressure regulator....pull the vacuum line off the regulator. If there is any fuel in the line, the regulator is faulty and must be replaced. This is the most likely candidate.

Mar 14, 2015 | Cadillac Cars & Trucks

2 Answers

My 2000 Cadillac Seville SLS jerks when I give it gas and it eventually cuts off what could be the problem


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

Nov 24, 2014 | 2000 Cadillac Seville SLS

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How can I tell if I have a faulty wheel speed sensor on 2002 Cadillac Seville SLS


One possible cause is that these systems remember values from the last time the vehicle was started. Sounds like sitting for a long time is caused unacceptable differences between current and last readings. This is possibly because of a vehicle attitude change, often due to a low tire pressure. Modern low profile tires are very sensitive to pressure changes - pressures tend to drastically change with changing ambient temperature and will deflate over time.
Also try starting the vehicle more frequently - that is needed to keep the drive train and electronic systems in good working order.

Sep 14, 2014 | 2002 Cadillac Seville SLS

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1997 cadillac sls stalls when driving. Have replaced fuel pump twice, and still have the same problem.


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.





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Nov 09, 2010 | 1997 Cadillac Seville

2 Answers

1997 Cadillac Seville SLS


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

Mar 22, 2009 | 1997 Cadillac Seville

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