For my Review I will write about the 1994 Sedan Deville.
As some of you know the Deville was redesigned in 1994. For this year we gained one new model and bid farewell for another. The Coupe DeVille did not make it to the 1994 Model year. The new model to the DeVille Stable was the executive’s racecar known as Deville Concourse. Styling was kept inline with the new for 1993 Rear Drive Fleetwood.
These cars were powered by the reliable pushrod PFI 4.9 v8. Making 200 hp and 275 lb feet of torque. These are not racecars by any means whatsoever. For a transmission the cars featured the 4t60e Transaxle. 4t60e standing for 4 speed “T”ransverse mounted 60 series “E”lectronicly controlled. All of this was in charge of moving the cars 3900lbs to 60mph in around 7-8 seconds and giving great passing power. The combo yields impressive fuel economy for a luxury car. With a light foot you can pry over 25 mpg on the highway. Expect 13-17 in town, stoplights turn this car into a gas sucking beast. The DeVille REQUIRES 20 gallons of PREMIUM fuel.
The 1994 Deville got the Speed Sensing Suspension system. This system adjusted the dampening rate over 3 levels as your speed changes, full firm mode coming in at highway speeds, while the full soft mode came into play on city streets. Out back also features the automatic leveling system. A stiffer body this year made the Deville much quieter over the outgoing 1993 DeVille. This was the beginning of GM attempting to create very high torsionally rigid bodies. By the 1995 Aurora they would lead the world in this area. Handling is good for such a big car, but attempt to run it to hard and it will under steer. When grip is found the car will darn near lay on the door handles in a turn. Like I said this isn’t a racecar.
The Sedan Deville’s interior is tame and comfortable. All Sedans had a column mounted shifter, bench seat and tons of room for 6. Trimmed in zebrano wood the interior is quite handsome. The typical mafia spec trunk measures 20 cubic feet. Small when compared the Lincoln Town Cars more useable 23 cubic feet. Then there is all the power goodies to make your trip comfortable. The Instrument cluster displays “oil life”, “timer”,”avg speed”,”avg mpg”, among a host of other messages and displays. There is a separate area to let you know how you’re doing as far a fuel mileage goes, showing average mpg and miles to empty, along with instant mpg. Instant mpg makes a handy tool to see how well the car is running. The stock stereo system has to be one of the best offered in 1994. Of coarse the Cadillac automatic parking brake relese is back ! Your first drive with one will have you looking for the relese , only to find as soon as the transmission is put into "reverse" it automaticaly pops back up. Manual relese is found underneath the dashboard in the event of vaccum failure.
This is the first year of the Cadillac “AirBank System”. Cadillac claims that this system yields airbag protection or all THREE front passengers. This was accomplished with an enlarged passenger side airbag. This airbag type is also one of the safest in the early 90s, instead of the passenger bag coming straight at you it actually goes up into the windshield and out, defecting some of the force into the windshield instead of your neck. ABS and child proof rear doors came standard along with a host of other safety feature outside traction control, which would arrive on the 95 Sedan Deville.
First is a key when your looking at just about any Cadillac, push “off” and “warmer”, this will yield any trouble codes for the car, if your looking at a Deville, write any codes down and come back and see us.
Codes you can expect to see on higher mileage 1994 DeVilles:
I039: Speed sensitive suspension issue, were all working on this one
P039: This shows the torque converter isn’t locking up to the computers satisfaction , the car will run like this for thousands more miles.
Other Trouble Spots:
Most Deville’s will end up with a lazy door lock on one door; you’ll have to unlock it manually at times. What goes wrong is a little rubber cup that actuates the door lock rod off the solenoid. If you have the problem feel free to contact me and I will show you how to fix it, it’ll only cost you a tube of superglue and a little of your time.
Another Trouble Spot is a clunk coming out of the front end going down the road. Most of the time this is the sway bar end links, they have gone sour. Replacements will cost around 80 bucks.
Transmissions: These are hit and miss, best advice here is the change the tranny filter out and replace the fluid when your supposed to. NEVER HAVE THE UNIT FLUSHED!
Cooling system. Coolant is to be replaced every year with fresh coolant, distilled water, and the GM coolant suppliment pellets. Failure to do so will cause engine damage in the form of leaky head gaskets.
Front Main “Thump”. When the engine is hot and in gear at parking lot speeds you’ll hear a “thump thump thump” in tune with engine RPM. Don’t worry too much about this; perfectly normal and it’ll go another 100k like this. If it bugs you enough go to your Cadillac dealer and order up a new main bearing, there is an upgraded thicker bearing out ask for it only!!!
EGR: If you experience a “ping” on acceleration and your using premium fuel you may be suffering from the EGR tubes being plugged up. Have a helper hold the throttle plates wide open with the engine off. Get a wire coat hangar stretch it out and rod the 2 tubes out till there clean. Get a small wire brush and clean up the throttle plates while you’re in there.
Water pump: we will all go blow a water pump on the 4.9, only use new GM units …nuff said.
Some of you may note hearing 4.9s having a growl to them. If yours growls, check out the power steering pump and ac compressor. Its pretty normal to replace everything the belt touches at around 130k
Idler Pulley: more than a few of us here have had the idler pulley seize on us on the highway shredding the belt and leaving us stranded looking for parts. Spend the 14 bucks and get a new one on it.
Rocker Arm Pivot Bolts (added 1/18/2004) : There have been a few cases reported here on 4100 , 4.5 and 4.9 cars . 2 of which occured on the 1994 4.9 cars on our board. The cause is unknown and we are not sure if it is a pattern or just poor quailty work when a mechanic worked on the valvetrain over the cars life. While troubleshooting a missfire and all other normal causes have been covered with no remedy it may be nessesary to pull the valve covers to inspect the valvetrain's operation. Apperently the bolts fracture allowing the intake and exaust valve to stay closed. If this happens to you do a search on "Rocker Arm Supports" you will find a host of posts on how to remedy the problem by our resiedent expert Bbob.
Thankx guys , means alot to me that you enjoyed it ....going to school for journalisim , want to end up working for the automagazines , this was my first dive into something like the magazines would do ....
Most Deville’s will end up with a lazy door lock on one door; .
If you have the problem feel free to contact me and I will show you how to fix it, it’ll only cost you a tube of superglue and a little of your time.
I have this problem in the drivers door. Please tell me how to fix this problem. Also, is there a fuse panel under the glove box in the 1994 Cad. Deville. I'm having an air conditioning problem and gas gauge problem and the AC man said there is a fuse under the panel which controls the AC and other things.
on the door lock , first you need to remove the door panel , there are 2 screwes behind the door grab strap covers there ...get those out ...then pull the cover off the door opening handle and lock area...there seems like there is ascrew there if i remeber right ....
at this point make sure the window is down once you get the panel off (there are several little plastic clips that hold it on) then remove the three bolts that hold the door latch to the door (i think these needed torx bits ) then carefully remove the metal locks rods from the latch then pull the plugs off the latch and get it out of the car set it on a workbench and looks for the part i posted a pic of in the threaed below: http://www.cadillacforums.com/forums...ight=door+lock
mark how that little cup is installed
supergule the split in that part , be sure when reintalling that little rubber cup that you put it in backawards of how it was in there...yes i said put it in backwards ...trust me ....
once you do that she will be good for another 10 years ...
Hey stoneage you dont HAVE to use the premium fuel. Gm made a deal with with gas companies and told people to use it. Only use premium if you hear knocking, and only if the knocking bothers you, because the knocking wont hurt your car. My grandmother does taxes for a guy who helped design the early 90's cadillacs, and I talked to him because I have a 93 sedan deville, and told me you can use low grade if you want to and it wont hurt your car. I personally use medium just in case.
Merl , i dont understand , why is it everyone is out to prove me wrong lately???...and why is it that it always someone with 10 or less posts thats never bothered to read the other threads on the subject?
here is the deal , bbob here on the forums is the guy that desgined the ht4100, 4.5 and 4.9 V8 engines found in front wheel drive cadillacs he also did the work on the northstar ....what he says is gospel for the 4.9 , he says to use premium ....the engine has no knock sensors and a couple other issues that require the use of premium fuel unless none is availbe then run enough of a low grade to get you where you can get premuim .....the ignition timing is set soft from the factory to allow the use of lower grade fuels in a pinch....an engine needs those knock sensors to dertimine the proper ammount of timing needed for optimum performace , the cadillac from the factory is set on a program ....it has no clue that the engine might be knocking (predetonation) or that anything less than premium is being used , thus it wont make the adjustments needed in that area , it can only guess whats going on thru the IAT sensor , engine load coolant temp and other sensors to determine current engine conditions
just because your grandmother does taxes for some guy that probably works ata dealer doesnt mean his word is the end all be all ...for god sake he lets you belive that knocking over a long perioid of time is a minor irritatation LOL.....
No he worked for GM, on cadillacs, dont remember his name. Yes I may be wrong about the knocking thing. It was a while ago that I talked to him. I do not know every thing about cadillacs. And i wasnt sayin over a long period of time on the knocking thing, I ment only for a few thousand miles until your next tune-up then switch to premium. I use medium, and occasionally premium and have never heard knocking, and my granddad used low-grade for 11 years.
ok , no offense but i post this stuff so everyone does whats best for these cars ...i just hate to see someone hurting these cars ....
bbob is brutal sometimes ,becuse he makes sure the correct info is out there..... belive me most of what i say nowadays is quotes from him , i had to throw away alot fo my experence to learn the proper way to care for these cars ,,,everything has a reason with them ....