Question about Cadillac DeVille

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I have 1997 Cadillac Deville 4.6 v8 Northstar 32 valve it has 90 pounds fuel pressure an it should have 40 to 50 pounds why is the fuel pressure so high?

Posted by Sally Cingano on

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Jeff Armer

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  • Cadillac Master
  • 15,575 Answers

Fuel pressure regulator . plugged fuel return line .

With the ignition switch ON and the fuel pump running, the fuel pressure indicated by the fuel pressure gage should be 333-376 kPa (48-55 psi).
The Fuel Pressure Check determines if the fuel system is providing fuel pressure. The components involved include the fuel tank, sending unit, pump, pipes and hoses, pressure regulator, fuel rail, and injectors. Also checked is the electrical operation of the fuel pump relay. This chart requires J 34730-1A , Fuel Pressure Gauge J 37287 , Inlet and Return Fuel Line Shut-off Adapters.

Posted on Feb 18, 2017

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5 Related Answers

Anonymous

  • 1010 Answers

SOURCE: location of engine and chassis number

There is a flat spot at the front of the right side (passenger side) cylinder head will have the last 6 of the Vin and letter code at the end of it for id purposes. You will see it looking down from the top of the motor.

Posted on Jul 06, 2008

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Anonymous

  • 147 Answers

SOURCE: Transmission and Torque converter replacement

rear wheel drive

Posted on Nov 11, 2008

emissionwiz

Marvin

  • 85239 Answers

SOURCE: 1997 cadillac deville water pump

it is on the front of the engine see photo
0648479.jpg

Posted on May 09, 2009

Kravcar

Mark Carrington

  • 192 Answers

SOURCE: 1997 cadillac deville engine is overheating.

When you say thermagasket kit,I assume you mean one of those silly DIY gasket sealant liquids that you put in the engine.

You should not use these type of products on ANY engine let alone the Northstar.

To cure a headgasket leak, replace the headgasket.....there is no miracle cure.

On the Northstar, you will damage the cooling system,plus you will continue to have issues as time goes on.

How do you know you have a blown head gasket?

Here is something to consider.......

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Posted on Jun 02, 2010

tech1969

Johnathan Lence

  • 443 Answers

SOURCE: How do you change the

put it up on jackstands ,be very carefull .take transmission pan bolts loose and drain fluid into a bucket or pan.once the fluid is drained remove bolts from pan change filter and gasket.

Posted on Oct 19, 2010

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1 Answer

Does a 1997 Cadillac Deville have a coil pack or a distributor cap


Michelle,

The 1997 V8 engine in the car is fitted with coil packs which are quite visible on the top of the engine. These need to be replaced when they eventually fail as is common.
Here is a video on the coils which may help you.................

How To Install Replace Ignition Coil 96 99 Cadillac Deville Northstar 4 6L...

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What is the normal temp for cooling system in 1997 cadillac northstar engine operation?


Thermostat would probably be wide open around 85-90 degrees. Pressure cap limits boiling temp to about 105.

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The starter motor is located under the intake manifold.Will require you remove the feul rail and wiring harness to get the intake off.

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How do you change the transmission fluid in a 1996 cadillac deville sedan with a 32 valve northstar v8?


put it up on jackstands ,be very carefull .take transmission pan bolts loose and drain fluid into a bucket or pan.once the fluid is drained remove bolts from pan change filter and gasket.

Oct 19, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

I have a 97' cadillac Deville. I found the thermostat in the lower hose just below the upper hose. Is it suppose to be in the upper? Is there a certain orientation for the new thermostat?


The thermostat in the Northstar is in the lower hose as you have stated.
The thermostat in the Northstar engine is a duel action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).
Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.
The cooling system in the Northstar does not work like the older,conventional systems, this is why most people are confused when they find the Thermostat in the lower hose.

Apr 14, 2010 | 1997 Cadillac DeVille

3 Answers

Need the firing order for a 2004 Cadillac v8 northstar


This should be the firing order;
2004 Northstar RWD/AWD 4.6L V8 (LH2) ... Firing Order: 1-2-7-3-4-5-6-8
Please be sure that when you list your questions on auto's be more precise on info provided. Sometimes listing the Vin Engine number helps to to locate info. Good Luck!

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1 Answer

Whta size thermostat for a 97 northstar engine?


Your engine is a 4.6 liter 281 CID V8.

There are thermostat rated for 180f or 195f for your engine,

I will select a 195f thermostat with a pressure relief poppet/valve to protect the coolant hoses.





Jul 17, 2009 | 1997 Cadillac DeVille

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