The 1986 Ford Escort with a 4-cylinder in-line engine and central fuel injection could experience overheating issues, often due to a faulty thermostat, a failing water pump, or clogged radiator.

The central fuel injection system might develop issues such as clogged injectors, failing fuel pump, or sensor malfunctions, leading to poor engine performance and starting problems.

The timing belt in 1986 models can wear out or break, causing severe engine damage as the engine's timing may go out of sync.

Due to age, the engine seals and gaskets may deteriorate, leading to oil leaks that can cause low oil levels and potential engine damage.

Problems with the ignition system, including worn spark plugs, failing ignition coils, or distributor issues, can result in engine misfires and poor performance.

The exhaust manifold on older vehicles like the 1986 Ford Escort can develop cracks, leading to exhaust leaks and potentially causing the engine to run poorly.

The 1989 Ford Escort with a 4-cylinder in-line engine is prone to overheating due to potential issues with the cooling system, such as a failing radiator, water pump, or thermostat.

Older Ford Escort models often suffer from oil leaks, which can be caused by deteriorated gaskets or seals, especially around the valve cover gasket and oil pan.

The timing belt in a 1989 Ford Escort may wear out or break over time, leading to engine misfires or significant engine damage if not replaced at recommended intervals.

The central fuel injection system in this model can develop problems such as clogged injectors or fuel pump failures, leading to poor engine performance and starting issues.

The ignition system, including spark plugs, wires, and the distributor, may wear out, causing difficulties in starting the engine or misfiring.

The exhaust manifold in older Ford Escorts can develop cracks, leading to exhaust leaks, increased noise, and potentially harmful gases entering the cabin.

The engine's vacuum hoses and connections may become brittle and crack over time, leading to vacuum leaks that can cause rough idling, stalling, and poor fuel economy.

Coolant leaks are common in older vehicles due to degraded hoses, radiator, or heater core, which can result in overheating and engine damage if not addressed promptly.

The 1992 Ford Escort with a 4-cylinder Mazda engine can suffer from overheating due to a faulty thermostat, clogged radiator, or failing water pump.

The in-line 4-cylinder engine may experience timing belt issues, which can lead to engine misfires or severe engine damage if not replaced at recommended intervals.

The Electronic Fuel Injection (EFI) system might have issues like clogged or leaking fuel injectors, leading to poor fuel economy and engine performance.

Common in older models, oil leaks can occur from the valve cover gasket, oil pan gasket, or crankshaft seals, potentially leading to low oil levels and engine damage.

Problems with the ignition coils, spark plugs, or distributor can cause misfires, rough idling, and starting difficulties.

Vacuum hoses and gaskets can deteriorate over time, leading to leaks that affect engine performance and cause rough running or stalling.

Issues such as a failing catalytic converter or exhaust manifold leaks can lead to poor engine performance and increased emissions.