Mercury Cougar 1983 Engine Stalling: Causes & Troubleshooting

Carburetor issues

The carburetor in your Mercury Cougar is responsible for mixing fuel and air in the correct proportions for combustion. If the carburetor is dirty, clogged, or not properly adjusted, it can cause the engine to die at varied stops.

Fuel filter issues

A clogged or dirty fuel filter can restrict fuel flow to the engine. This can cause the engine to sputter or stall, especially when the engine is under a load.

Fuel pump issues

A faulty fuel pump can't deliver enough fuel to the engine. This can cause the engine to stall or run poorly, especially at high speeds.

Ignition issues

A bad spark plug, spark plug wire, distributor cap, or rotor can cause the engine to misfire or stall. This can be especially noticeable at low speeds or when the engine is under a load.

Vacuum issues

A vacuum leak can cause the engine to run lean, which can cause it to stall or run poorly. This is especially noticeable at idle or when the engine is decelerating.

Throttle body issues

A dirty throttle body can cause the engine to idle roughly or stall. This is especially noticeable when the engine is first started or when it is decelerating.

Fuel injector issues

A stuck fuel injector can cause the engine to run rich, which can cause it to stall or run poorly. This is especially noticeable at high speeds or when the engine is under a load.