Engine Controls - Service & Adjustment Specifications: Other Mercury Sable IV

ENGINE COMPRESSION

Warm engine to normal operating temperature. Check compression at cranking speed with throttle wide open and all spark plugs removed. Ensure crankcase is at correct level and oil is of correct viscosity. With compression gauge installed, use remote starter to crank engine.

Crank engine 5 revolutions (minimum) and record highest pressure gauge reading. Repeat procedure for all cylinders using approximately same number of revolutions. Lowest compression reading should not be less than 75 percent of highest compression reading. Cylinder compression readings should not be less than 100 psi (7 kg/cm 2 ).

VALVE CLEARANCE

Note. All models except 2.0L (VIN B, 3 or 5), 3.0L (VIN S) and 3.9L (VIN A) are equipped with hydraulic valve lifters. See VALVE CLEARANCE SPECIFICATION table. Valve adjustment is not required if equipped with hydraulic lifters. If valves are noisy or incorrect clearance is suspected, worn components are indicated. Check collapsed valve lifter clearance. See appropriate article in ENGINES.

VALVE CLEARANCE SPECIFICATION

FUEL INJECTOR RESISTANCE

HIGH TENSION WIRE RESISTANCE

HIGH TENSION WIRE RESISTANCE

IGNITION TIMING

Note. On all models with Distributorless Ignition System (DIS), manufacturer does not recommend checking ignition timing, as faulty readings are common and timing is not adjustable.

BASE IGNITION TIMING

FUEL PUMP

Note. For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS .

IDLE SPEED & MIXTURE

Note. Idle mixture is not adjustable. If idle mixture is incorrect, see TEST H: FUEL CONTROL in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.

IDLE RPM SPECIFICATION (1)

THROTTLE POSITION SENSOR

TP SENSOR OUTPUT