Engine Controls - Specifications - 7.3L Diesel: Other Ford Econoline E350

ENGINE COMPRESSION

Check engine compression with engine at normal operating temperature, all spark plugs removed (on dual plugs, remove exhaust side only), and throttle wide open. Ensure crankcase is full and oil is of correct viscosity. With compression gauge installed, use remote starter switch to crank engine.

Crank engine at least 5 revolutions, and record highest 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. No cylinder compression reading should be less than 100 psi (7 kg/cm 2 ).

V8 COMPRESSION RATIO SPECIFICATIONS

VALVE CLEARANCE

Note. Vehicles are equipped with hydraulic valve lifters; valve adjustment is not required. If valves are noisy or incorrect clearance is suspected, worn components are indicated. Check collapsed valve lifter clearance. See appropriate article in the ENGINES section.

HIGH TENSION WIRE RESISTANCE

HIGH TENSION WIRE RESISTANCE

FIRING ORDER & TIMING MARKS

Note. Use illustrations for firing order and timing marks. (Scheme 9)

Identifying Firing Order (7.3L). Scheme 9

IGNITION TIMING

Note. Vehicles have distributorless electronic ignition; manufacturer does not recommend checking ignition timing, as faulty readings are common and timing is not adjustable.

BASE IGNITION TIMING

IDLE SPEED & MIXTURE

Note. Idle mixture is not adjustable. For additional information, see TESTS W/CODES - 7.3L DIESEL article.

IDLE RPM SPECIFICATION

THROTTLE POSITION (TP) SENSOR

Note. Throttle Position (TP) sensor is not serviceable. If TP sensor service is required, see CIRCUIT TEST DH in TESTS W/CODES - 7.3L DIESEL article.

TP SENSOR OUTPUT