2. Intake manifold gasket failure: The intake manifold gasket seals the intake manifold to the cylinder head. When it fails, vacuum leaks can occur, causing rough idling, decreased power, and poor fuel economy.
3. Water pump failure: The water pump circulates coolant throughout the engine to keep it cool. When it fails, coolant cannot circulate, causing overheating and engine damage.
4. Fuel injector failure: The fuel injectors spray fuel into the engine's cylinders. When they fail, the engine can run lean or rich, causing performance problems, decreased fuel economy, and emissions issues.
5. Transmission problems: The 1988 Cadillac Sedan DeVille was available with either a 4-speed automatic or a 5-speed manual transmission. Common transmission problems include slipping, hard shifting, and fluid leaks.
6. Electrical problems: The 1988 Cadillac Sedan DeVille was equipped with a variety of electrical components, such as the ignition system, lighting, and climate control. Common electrical problems include faulty wiring, blown fuses, and malfunctioning switches.
7. Rust and corrosion: The 1988 Cadillac Sedan DeVille was built on a steel chassis, which is susceptible to rust and corrosion. Common areas for rust to develop include the underside of the car, the wheel wells, and the trunk.