Top 10 1998 Cadillac DeVille Questions & Answers

1998 Cadillac DeVille Logo

Question

  • 11,939 People Helped

Something is draining my battery on my 1998 Cadillac DeVille

Something is draining the battery on my 1998 Cadillac DeVille. I have had the charging system checked and the battery,alternator, and starter are all good. Could it be that the positive batery cable corroided where it connects to the starter? I have changed the negative cable.Thanks.

Posted by on

Answer

  • Most Helpful of 2 Answers

I suspect parasitic draw. All vehicles draw some power from the batteries when the car is shut off. Certain accessories such as clocks, radios remote door openers and alarms always need power. The normal power used is called parasitic draw.

It is always a very low draw so it doesn't run the battery down. If you install accessories like shortwave radios or plug things like inverters and portable refrigerators into the accessory socket and operate them too long without the engine running you can drain your batteries to the point where the engine won't start. If there is an electrical short in the vehicle or a malfunctioning accessory it could be drawing much more than its normal load causing a drain on the batteries. If you leave your door open and the inside lights stay on all night you could drain the battery down till the car won't start.

Here's also a good resource for your car specifically on narrowing down the cause of the drain.

Posted on Oct 23, 2012

Question

  • 4,789 People Helped

98 Cadillac Northstar motor running hot in 30 min.

My cadillac is runnig hot after 30 min. the water is pushing out the purge valve.. My purge valve connects to tank , but not to the motor. Is that part of the issue? What is the normal temp. for the Northstr motor?

Posted by on

Answer

  • Most Helpful of 3 Answers

The normal operating temperature for the Northstar engine is around 210 degrees.
The fans will not come on until the temp hits 225 degrees.

The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems).

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 to near the thermostat housing,the blockage may be there.

If the other end of your purge line is not connected to anything then that is the problem......it must be reconnected otherwise the cooling system is not pressurized.

Posted on Apr 20, 2010

Question

  • 3,674 People Helped

ABS/TRACTION CONTROL WARNING LIGHTS ON

I HAVE A 1998 CADILLAC SEDAN DEVILLE THAT NEEDED REAR BRAKES.
I TOOK IT IN FOR REAR BRAKES (PADS) AND AFTER TAKING THE CAR THE ABS & TRACTION CONTOLR WARNING LIGHTS CAME ON.
I WAS NOT HAPPY WITH THE SERVICE WERE I TOOK MY CAR SO I DON'T REALLY TRUST THEM TO TAKE MY CAR BACK TO THEM. CAN ANYONE LET ME KNOW IF IT'S POSSIBLE THAT THEY MIGHT HAVE DONE SOMETHING WRONG OR DO I NEED TO RESET THE LIGHTS MAYBE ??? ANY TIPS WOULD BE GREATLY APPRECIATED IT !!!
THANKS !!!!

Posted by on

Answer

  • Most Helpful of 2 Answers

Sounds like they may have left something disconnected like the ABS/ Traction control wheel sensor, make them fix it!!

Posted on Sep 08, 2008

Question

  • 3,286 People Helped

1998 Cadillac Deville overheating

1998 Cadillac Deville overheating . Engine overheats to 245 + degrees when running 50 mph or more with some torque load.( ie.hills and 4 passengers) New thermostat and coolant reserve pressure valve.were installed. Engine runs fine for 1st 20 minutes or so, then temp rises to 220 + degrees at speed up to 50pmh or so.
Temp goes back down to 199 or so when in regular , slower traffic.

Posted by on

Answer

  • Most Helpful of 4 Answers

The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,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 to near the thermostat housing,the blockage may be there.

Posted on Mar 28, 2010

Question

  • 2,852 People Helped

98 cadillac deville needs rear shocks

can air shocks be replaced with regular shocks - is there a conversion kit available?

Posted by on

Answer

  • Most Helpful of 5 Answers

I have a 1998 Deville and both rear coil springs are broken.. It also has the air shocks that I dont think work.. Can I put regular shocks in and is there a after market coil spring out there for it ??

Posted on Aug 07, 2009

Question

  • 2,775 People Helped

How to reset AC on

How to reset AC on 1998 Cadillac Deville after servicing.

Posted by on

Answer

  • Most Helpful of 1 Answers

you can reset the computer by disconnecting the positive cable on your battery for 5mins. only be sure that your radio does not have to be recoded afterwards. refer to owners manual. resetting your computer will reset all codes even if your check engine light is on,,but depending what's wrong it will not repair everything! i hope this helps!

Posted on Aug 25, 2010

Question

  • 2,458 People Helped

1998 Cadillac Deville low refrigerant a/c

1998 Cadillac Deville mesage low refrigerant a/c off?

Posted by on

Answer

  • Most Helpful of 3 Answers

I have a 1999 Cadillic Deville. The low Frefrigerant indicater come on after about 15 minutes of disconnecting the battery power. Each Time I reset the power the air conditioner comes back on for a while then goes out. I have taken it into the local auto repair place and they find no problem with the unit.
Could this be a intermittent connection to the computer. They have replaced both sencors and the problem persists. Where is the computer located on the car that handles this AC sensor message?

Posted on Jul 14, 2010

Question

  • 2,398 People Helped

Will a bad catalytic converter

Will a bad catalytic converter cause a car to smoke? Can a head gasket repair job cause a catalytic converter to go bad? Can a head gasket repair job cause an alternator and a MAF sensor to go bad?

Posted by on

Answer

  • Most Helpful of 1 Answers

you have numerous problems to address, the cat could cause the car to smoke, but only because something is getting in it, heating up , and causing the smoke, normally if its white its due to water, and blue or gray due to a fuel issue , as far as a head gasket, if it was bad your cat could be bad too, so could the MAF sensor,, the alternator could work into this mess just due to the sensors not providing the correct signals to be sent to the computer in the car ,, but I doubt its bad , it can be simply checked, if you have a known good battery ,, use a meter and place the leads on the battery terminals, you should see a reading of between 13.5 and 14.5 volts, ( with the car running) if you do the alt is good, if not,, its probably bad,, There are two common types of mass airflow sensors in use on automotive engines. These are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with an additional sensor or two, the engine's air mass flow rate can be accurately determined.

Both approaches are used almost exclusively on electronic fuel injection (EFI) engines. Both sensor designs output a 0.0-5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and both sensors have an intake air temperature (IAT) sensor incorporated into their housings.

When a MAF is used in conjunction with an oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop controller predicted air flow information (the measured air flow) to the ECU, and the oxygen sensor provides closed-loop feedback in order to make minor corrections to the predicted air mass.

Posted on Sep 20, 2011

Question

  • 2,294 People Helped

electronic level control not working right

electronic level control not working right in a 1999 cadillace deville, what can i do to fix it?

Posted by on

Answer

  • Most Helpful of 1 Answers

To begin with, check the "ride level" fuse and make sure that the ride level compressor does work, and you should be able to hear that the ride level compressor is working when the ride level system is leveling the vehicle.

The ride level system uses an air compressor and either an air type of shocks or a type of air billow to raise and lower the vehicle, there is an adjustment to set the ride height and it is located under the vehicle and there is a control lever or rod that should be connected between the rear axle and a switch that is mounted on the body of the vehicle, and there will be an adjustment slot in the control lever between the switch and the body, and that is how you would adjust the ride level height, but be sure that the vehicle can not drop any further down if someone is under the vehicle trying to adjust the ride height.

However, you might find that the control lever to the ride level has fallen off from the switch on the body or it has come loose from the rear axle, and it is just hanging there not operating the switch on the body that controls the the ride level compressor, or there might be a blown out air shock or billow, or you might find that an air line from the compressor is leaking and the ride level compressor will just run continuously until it blows out the fuse, and if that is the case you might also find out that the air compressor has burned out from running continuously.

Posted on Jun 12, 2010

Question

  • 2,134 People Helped

My 98 Cadillac DeVille rear air suspension system

My 98 Cadillac DeVille rear air suspension system works great UNTIL I load weighted luggage in trunk and passengers in back seat. I then drive around for 15 to 45 minutes and thats when the rear end of the car is bottomed out (wheel well is now down to the white stripe on tire). With car running I get out and do not hear the pump running to supply air to shocks. With no luggage or passengers the pump and car woks perfect. I have tried to fix problem by having dealership replace pump and leveling sensor ($1300+ so far). Dealership has checked air lines and air bags in shocks more than once and cannot detect any leaks. Any advice would be appreciated.

Posted by on

Answer

  • Most Helpful of 1 Answers

Common problem on all air suspension vehicles. It could be that there is a hairline crack in one of the shock bladders or that the pump is just too weak to pump up to it's intended pressure, a sensor or solenoid could also be bad.

Whenever I run into this problem I order a spring conversion kit for that vehicle, it is usually not worth spending $3000+ to repair the suspension.

www.Strutmasters.com sells the best kits, $327.00 for the rear. It also comes with a resistor so that your suspension light is not on.

Posted on Sep 19, 2009

2,046 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Top Cadillac Experts

Marvin
Marvin

Level 3 Expert

84625 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

1998 Cadillac DeVille DeVille

  • 1998 Cadillac DeVille DeVille

Most Popular Question

tell seat motor controls seat go back

  • Cars & Trucks
Loading...