ENGINE MECHANICAL
Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay.
VALVE CLEARANCE
Hydraulic valve lash adjusters are used. Valve clearance adjustment is not required.
VIN 3
Note. Ignition timing is not adjustable on models with distributorless ignition systems.
VIN A
- Ensure engine is at operating temperature, all accessories are off, and transmission is in Park or Neutral. Set parking brake. Ensure idle speed is correct.
- Connect timing light to No. 1 spark plug wire. Remove shorting bar from double-wire Spark Output (SPOUT) connector. Shorting bar is located near distributor, in wiring harness to Ignition Control Module (ICM). Start engine. Check base ignition timing. See 4-CYLINDER BASE IGNITION TIMING table.
- If timing is not correct, loosen distributor hold-down bolt. Adjust timing as necessary. Turn engine off. Install shorting bar in double-wire SPOUT connector. Start engine. Check computed ignition timing. Computed ignition timing should be advanced beyond base timing.
| Application | Degrees BTDC @ Idle |
|---|---|
| VIN A | (1) 9-11 |
| VIN 3 | (1) (2) 8-12 |
| (1) Disconnect single in-line SPOUT connector, or remove shorting bar from double-wire SPOUT connector. (2) Timing is not adjustable. | |
| (1) | Disconnect single in-line SPOUT connector, or remove shorting bar from double-wire SPOUT connector. |
| (2) | Timing is not adjustable. |
4-CYLINDER BASE IGNITION TIMING
THROTTLE POSITION (TP) SENSOR
Note. Information for TP sensor adjustment is not available.
Ensure TP sensor is properly installed. See THROTTLE POSITION (TP) SENSOR under FUEL SYSTEM in appropriate REMOVE/INSTALL/OVERHAUL article
- For Contour & Mystique, see «REMOVE/INSTALL/OVERHAUL - 2.0L»(ref-23135)
- For Probe, see «REMOVE/INSTALL/OVERHAUL - 2.0L»(ref-23136)
If additional test procedures are required, see the TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.