Sticker & Asking Price
High Torque, Low Price!
92 STS Bruce
Well-loved 1992 STS 125K miles, Polo Green/Neutral leather, heated seats, Bose/CD, garage door opener, autodim mirror.
Edelbrock exhaust, Fastchip upgrade, new fuel injectors, shop manual, new car video for the 1992 cars, new car brochure for the 92 cars, Parts book for 1992. Three keyless remotes, two sets of keys.
Located in Plano, TX, a suburb of Dallas.
I purchased this car three years ago with 63K miles, after careful research. The car is Polo Green exterior, Neutral leather interior. It is the STS, which in 1992 came with the trusty Cadillac 4.9L OHV engine (not the Northstar, which came in 93). I am the third owner, and have all records on the car in the glove box. Car has heated front seats, autodim rear view mirror, keyless remote, and Bose Gold sound system with in dash CD/Tape/radio. The 92 was the first year for this body style, that lasted until 1997, so the car looks newer than it is.
The car has a custom Edelbrock exhaust, and a Fastchip custom computer chip. I have changed the oil religiously myself, using synthetic Mobil 1 oil and synthetic ATF fluid in the transmission. This is probably one of the quickest 92 STS's on the planet.
Tires are okay (not great), New tires on front, good tires on rear; AC blows cold, electrics all work, car drives well. Opening price set at more than $2000 under the KBB retail; (you can check that at kbb.com) someone is going to get a great deal here. Car has a clean carfax report. Never wrecked.
I run a Cadillac enthusiast web site, and have fixed things as they came up with the car; known issues:
+ wear (small hole) on the driver seat side bolster. . See: http://www.angelfire.com/stars/mycaddy/stsdvr.htm for a view of the wear.
+ small cracks in leather on the center console
+ some parking lot dings & scrapes. I have the correct Cadillac touch up paint.
+ struts are not electronic any more; just normal. The car rides well.
+ The car has 125K miles on it, and has been driven daily. This is not a show car, but looks very good. I consider it to be a reliable car, and would not hesitate to take it cross-country again. Car has always been a Texas car, and is very clean. You can see more photos on the site above.
Most recent maintenance accomplished:
+ new fuel injectors
+ transmission service
+ driver's side window electric motor replaced
+ replaced Bose head unit and amps in driver door and left rear shelf.
Reason for selling: bought a newer 96 STS, can't keep both. These are great cars. We have taken this car cross-country to South Carolina from here in Texas several times on family vacations (leaving the minivan at home!).
I have several car specific items I will include with the car: Helm shop manual ($100 value), dealer video on the 92 STS, showroom brochure for the 92 model line, touch up paint, and a new keyless remote.
I have really enjoyed this car, and I hope you do too.
Bruce's 1992 Cadillac Seville STS Parts/Notes:
- Spark Plugs - I replaced the AC-Delco's with Bosch Platinum plugs. Throttle response seemed softer with these in - bad news. Put new AC/Delco Platinums in this time.
- Ignition-- upgraded to Accel Super Coil, distributor cap, & rotor. This improved the spark shape and strength at higher rpm.
Also added the Accel HEI distributor module. Graphs show some slight gain at 4800-4900, but probably not worth the $.
I am using MSD Heli-core wires now. I wanted to make sure that there is a clean spark pulse, with minimal induced pulses. The MSD wires ohm-out at about 1/2 the resistence of the stock wires.
- Temperature - the normal Seville temperature runs from 190 degrees to 230 degrees fahrenheit. Here in the Texas heat this summer, my car runs in the high end of that range, occasionally even up to 234 degrees. Besides basic maintenance -- flush the radiator, check the hoses -- I have also changed to a 180 degree thermostat (the stock is 195). I added manual override switches for the radiator fans; now I have a switch panel just above the hood latch under the dash - a yellow switch turns the fans on to low speed; a red switch turns the fans to high speed. The engine still controls the fans as normal; the switches are just a manual override. If I am stuck in traffic I can choose to hold the engine temperature down (and handy for the dyno runs).
- PCM (Computer) - I installed a FastChip. Fastchip claims an increase at the flywheel to 220 HP, 310 ft-lbs of torque. Easy to install - took 20 minutes. Ed Wright is easy to deal with.
Note the Cadillac 4.9L PCM Recall
- Oil & ATF - I use Mobil 1 10W30 Synthetic Motor Oil ($23/case at Wal-Mart). Changing the oil myself offsets the cost for the synthetic oil. Worth the trouble. I use the AC/Delco PF45 (or the PF58 equivalent) filter ($2). I also have changed the transmission fluid to Mobil1 Synthetic ATF ($5.05/qt x12 quarts at Chief Auto Parts plus fluid exchange $79 at Jiffy Lube). The Synthtic ATF made the shifting even smoother; no measureable HP improvement, though.
- Tires - Added Pirelli P4000 SuperTouring 225/60R16's to replace the Yokohoma A378's that have been discontinued. The P4000's burned off in 20K miles, but mostly because the right front spins a lot. Replaced with 4 BF Goodrich Touring T/A VR4's. Replaced those with 4 Continental's, mostly cause they were in stock and I had a trip planned. Now I am religious about having them rotated every other oil change, so maybe they won't "burn off" so fast.
- Exhaust - Edelbrock RPM Series #5519 Muffler: this is a "Camaro" style muffler, and is an exact replacement for the stock Cadillac Muffler. It takes a 2.5 in input, and comes out with two 2.25 inch outlets. The stock outlet pipes look to be 2 inchers, but the muffler shop just put on an adapter. Pep Boys quoted $145 for the muffler, but I got it from Pronto Mufflers here in Plano for $180 + tax installed. According to the G-TECH, it released 15 hp. The sound is loud; before, I could only hear engine noise, and no exhaust noise. Now the exhaust has a very full, round burble that matches the throttle on acceleration, then falls silent for cruise. I like it.
- From the Magnaflow website: C.R. McCurdy, Lilburn, GA Cadillac Sedan Deville I recently purchased a 1992 Cadillac Sedan Deville. The car has a 4.9, 200HP V8, and is my first experience with front wheel drive (Been driving since 1955). Two weeks after purchase, I had a Magnaflow muffler installed--at the recommendation of Andy at Andy's Muffler in Snellville, GA. Not only does it sound GREAT and perform better, the gas mileage improved more than 2 miles per gallon (in Atlanta commuting). On my recommendation, two of my co-workers have had a Magnaflow installed on their vehicles. Thank you for such a fine product.
- Weight - Cadillac said the curb weight for the 92 STS was 3,721 pounds. The door GVWR shows 4689 pounds, which includes five 180 pound passengers, or 3789 empty. My car weighed at 3680 +/- 100 on a scale; the Helms manual and the original Motor Trend test suggested 3689 lbs. I think this is correct.
- Fuel Economy I have put up a chart of my average mpg at each fill-up. The EPA rating for my car is 16 city/25 highway.
- 4/04/99 update -- 560 mile roundtrip Roadtrip -- averaged 25.4 mpg on the way, 26.5 mpg on the way back with 3 passengers & luggage.
- 5/23/99 After Accel coil/cap/rotor -- 280 mile trip alone/economy A/C, some rain -- averaged 27.9 mpg.
- Period brochures - available from Paul Helmbach. I got my 92 Cadillac line brochure from Paul.
- Manuals: the Chilton's part number 8420, General Motors Deville/Fleetwood/Eldorado/Seville 1990-1993 Repair Manual has been a handy reference. Buy it today on Amazon!
- I also got the dealer parts book for the 92 Seville, and the 92 Seville sales video from auctions on ebay.com
- Transmission: the 92 STS uses the GM 4T60-E Transmission.
Chip & Transmission Info from Pro-Tech Transmissions:
We can build any Model & Year transmission High Performance and/or Heavy Duty. We also cover Allante 89-93, Deville 87-95, Eldorado 87-95, Fleetwood 87-94, Seville 87-95 with our Pro-Tech Chip. On the Cadillacs we rage from 17-35hp gains & 30-45ft/lbs of torque gains. If you would like to get more information you would have to send or call with a specific year, model, & engine size so we can give you an exact figure. You can reach us toll free @ 1-866-PRO-TEC1.
- Update: AP-22 Results for 0-70 mph and HP
- Fuel Economy
Comments, Questions, Corrections?
Copyright Bruce W. Nunnally 2001