Well let's see where to start, the alternator went bad within two weeks of owning this car, this led to electrical problems which had left me stranded in the middle of nowhere a few times. Then I started noticing coolant leaking out of the bottom of the car. Here an unexpected leak happened out of the middle of nowhere and my electrical service light hadn't notified me. The engine started making a pop corn like noise and my car would shut off out of the middle of nowhere after I had fixed the leak, replaced the alternator, and the battery. I took it into the shop and cylinder #2 had gone bad which would've been $1500 to fix. So the bozo's that had the car before me forgot to use the special beads to lubricate the engine which was the primary cause of the engine problems.
This car is an all around bad car to have due to the dreaded ht 4100 engine and bad engineering. If you want a reliable car definitely do not buy this car because you'll pay more maintaining it and putting gas into it a jaw dropping 13.5 miles to the gallon average than the car is worth. Also it's very slow and hard to maneuver in a bad situation, and the seat-belts rarely lock even when the brakes are hit which has cause many of my passengers and I bruises to the head. Don't buy this car!!
I bought an 86 Coupe from an elderly woman in 1998 for $4000. With 45,000 miles, it looked and drove like new. On the ride home, the oil pressure light came on. A new oil pump, plus a new water pump, over $ 900, and I had only driven it 5 miles.
Everything went wrong with that car in the 5 years I owned it. I finally sold it in 2003, with 70,000 miles, repaired and driving beautifully. It still looked great. A week later, it broke down on the guy I sold it to. Oil wasn't getting to the engine and destroyed it. Fortunately, the guy didn't blame me for the disaster. He gave the car away.
Listen carefully, do not buy a 86 Cadillac.
DPC.