Engine Controls - Adjustments - 7.3l Diesel (VIN K & M) Ford Econoline E350

ENGINE MECHANICAL

Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay.

VALVE CLEARANCE

Note. Valve cover(s) must be removed before performing valve adjustment. See 7.3L V8 DIESEL - VINS (K,M) article in ENGINES for removal and installation procedures.

VALVE CLEARANCE ADJUSTMENT

Note. Hydraulic valve lifters are used; no valve adjustment is required. If incorrect valve clearance is suspected, lifter must be collapsed before clearance can be checked.

Position each piston at TDC of compression stroke of cylinder to be checked. Using Lifter Bleed Down Wrench (T83T-6500-A), bleed lifters until lifter plunger bottoms. Check valve clearance. See COLLAPSED VALVE LIFTER SPECIFICATIONS table. If clearances are not correct, check valve train components for wear or damage. Replace as necessary.

COLLAPSED VALVE LIFTER SPECIFICATIONS

STATIC TIMING

1. Remove fast idle bracket and solenoid from injection pump. Using Pump Mounting Wrench (T83T-9000-B), loosen nuts holding injection pump to pump mounting adapter. Install Rotating Wrench (T83T-9000-C) on front of pump, and rotate to align timing mark on pump mounting flange with timing mark on pump mounting adapter. (Scheme 10)
2. Align timing marks to within.030". Remove rotating wrench and tighten nuts to 84 INCH lbs. (9.5 N.m). Install fast idle bracket and solenoid.

Scheme 10

DYNAMIC TIMING

Note. Engine must be at normal operating temperature of 192-212°F (89-100°C) when checking/setting dynamic timing.

1. Warm engine to normal operating temperature. Stop engine and install Dynamic Timing Meter (078-00200) into timing probe hole until it almost touches vibration damper. (Scheme 11)
2. Attach clamp from Timing Meter Adapter (078-00201) to line pressure sensor on No. 1 injector nozzle ("F" Pickup) or No. 4 injector nozzle (Econoline Van), and connect to dynamic timing meter. Connect dynamic timing meter to battery. Dial in minus 20 degrees offset on meter.
3. Disconnect cold start advance terminal connector from solenoid terminal. (Scheme 12) With transmission in Neutral and rear wheels raised, start engine. Using Throttle Control (D83T-9000-E), set engine speed to 2000 RPM with no accessory load.
4. Observe injection timing on dynamic timing meter. Injection timing should be 8.5 degrees BTDC at 2000 RPM. Apply battery voltage to cold start advance solenoid. Energizing cold start advance solenoid can increase engine speed. Adjust throttle if necessary.
5. Timing at 2000 RPM should be advanced at least one degree before the timing obtained in first timing check. If advance is less than one degree, replace fuel injection pump top cover assembly. If dynamic timing is not within ± 2 degrees of specification, adjust pump timing. See the «DYNAMIC INJECTION TIMING SPECIFICATIONS»(/ford/econoline-e350/1985-1999/remont/adjustments/#engine-controls-adjustments-73l-diesel-vin-k-m) table.

Scheme 11

Scheme 12

Note. Always refer to Emission Control Label in engine compartment before attempting service. If manual and label differ, always use emission label specifications.

DYNAMIC INJECTION TIMING SPECIFICATIONS (1) (2)

IDLE SPEED & MIXTURE

Note. Idle mixture is not adjustable. If idle mixture is incorrect, see G - TESTS W/CODES - 7.3L DIESEL (VIN K & M) article.

COLD (FAST) IDLE

1. Connect tachometer. Set transmission in Neutral (M/T) or Park (A/T). Start and warm engine to normal operating temperature. Unplug fast idle solenoid. Apply battery voltage to solenoid.
2. Rev engine momentarily to set solenoid. Fast idle should be 800-850 RPM. Adjust by turning solenoid plunger. (Scheme 12) Recheck fast idle and adjust if necessary. Reconnect solenoid.

IDLE ADJUSTMENT PROCEDURE

1. Shift transmission to Neutral or Park. Warm engine to normal operating temperature. Measure idle speed with transmission in Neutral (M/T) or Drive (A/T). Ensure curb idle adjustment screw is against stop.
2. Connect tachometer. Measure curb idle speed. Idle speed should be 600-700 RPM. Rotate adjuster screw to adjust idle speed. (Scheme 12) Repeat check, and adjust again if necessary.

Scheme 13

1. Install scan tester. Enter Key On Engine Off (KOEO) self-test while holding throttle in Wide Open Throttle (WOT) position. After last service code has been displayed, remain in self-test. Place.515" (13.08 mm) Gauge Block (T83T-7B200-AH) between fuel pump lever travel screw and gauge boss. (Scheme 13)
2. Cycle Overdrive Cancel Switch (OCS) once. Observe Self-Test Output (STO) on scan tester for the following conditions: Constant tone, solid light, or STO LO readout indicates FIPL sensor is within range. Cycle OCS to exit test. Fast beeping tone, flashing light, or STO LO erratic readout (4 per second) indicates FIPL sensor requires adjustment. Slow beeping tone, flashing light, or STO LO erratic readout (one per second) indicates FIPL throttle sensor requires adjustment. No tone, solid light, or STO LO readout indicates FIPL throttle position sensor may have worn internal components. Check by trying to move sensor.
3. If FIPL sensor and bracket screws are tight and there are no signs of wear between mounted parts, loosen FIPL sensor attachment screws. (Scheme 14) Rotate sensor one way or the other until a constant tone, solid light, or STO LO readout is obtained. Tighten FIPL sensor attachment screws. If a constant tone, solid light, or STO LO readout cannot be obtained, replace FIPL sensor.

Scheme 14

See also:
• COLLAPSED VALVE LIFTER SPECIFICATIONS