ENGINE MECHANICAL
Note. Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay.
VALVE CLEARANCE
Note. All engines use hydraulic valve lash adjusters. No adjustments are required.
Optima & Magentis (Canadian)
Base ignition timing inspection procedure, is not available from manufacturer.
Rio & Spectra
Ensure engine is at normal operating temperature. Turn off all electrical loads. Set transaxle in Park or Neutral and steering wheel on straight forward position. Remove provided inspection rubber plug on plastic coils cover, over number one spark plug wire. Connect timing light inductive pick-up to number one spark plug wire. If timing light inductive pick-up is too large, plastic coils cover have to be removed. Start engine and allow it to idle. Check base ignition timing. Timing mark on crankshaft pulley and mark on timing belt cover should be aligned to specification. See BASE IGNITION TIMING table. If timing is not within specification, check for faulty sensor or incorrect camshaft timing. Check power and grounds. If camshaft timing, sensors, power and grounds are okay, replace Engine Control Module (ECM).
Sedona & Sorento
Ensure engine is at normal operating temperature. Turn off all electrical loads. Set transaxle in Park or Neutral and steering wheel on straight forward position. Ground ignition timing adjustment terminal of underhood Data Link Connector (DLC). (Scheme 2) Start engine and allow it to idle. Check base ignition timing. Timing mark on crankshaft pulley and mark on timing belt cover should be aligned to specification. See BASE IGNITION TIMING table. If timing is not within specification, check for faulty sensor or incorrect camshaft timing. Check power and grounds. If camshaft timing, sensors, power and grounds are okay, replace Engine Control Module (ECM).
| Application | Degrees BTDC @ Idle | |
|---|---|---|
| Optima & Magentis (Canadian) | ||
| 2.4L | 3-7 | |
| 2.7L | 7-17 | |
| Rio | 1-11 | |
| Sedona | 8-12 | |
| Sorento | 8-12 | |
| Spectra | (1) | |
| (1) 5 degrees ATDC to 15 degrees BTDC | ||
| (1) | 5 degrees ATDC to 15 degrees BTDC |
BASE IGNITION TIMING
Optima, Magentis (Canadian) & Sorento
Base idle speed inspection procedure, is not available from manufacturer.
Ensure engine is at normal operating temperature. Turn off all electrical loads. Set transaxle or transmission in Park or Neutral and steering wheel on straight forward position. Connect tachometer inductive pick-up on spark plug wire. On Rio, a non-inductive tachometer can be used. Place positive lead on underhood Data Link Connector (DLC) terminal No.3. (Scheme 1)Start engine and allow it to idle. Check idle speed. See IDLE SPEED SPECIFICATIONS table.
Sedona
Ensure engine is at normal operating temperature. Turn off all electrical loads. Set transaxle in Park or Neutral and steering wheel on straight forward position. Loosen the accelerator cable. Connect tachometer to spark plug wire. Ground ignition timing adjustment terminal of underhood Data Link Connector (DLC) terminal No. 6. (Scheme 2) Run engine for 5 seconds at 2000 to 3000 RPM. Let engine idle for 2 minutes. Check engine base idle speed. See IDLE SPEED SPECIFICATIONS table. If base idle speed is out of specification, adjust using the idle speed adjustment screw on throttle body assembly. Turn ignition off. Disconnect ground lead wire from DLC. Run engine for 10 minutes, Re-check engine idle speed. Adjust accelerator cable.
| Application | (1) RPM | |
|---|---|---|
| Optima & Magentis (Canadian) | ||
| 2.4L | 700-900 | |
| 2.7L | 600-800 | |
| Rio | 700-800 | |
| Sedona | 600-800 | |
| Sorento | 700-900 | |
| Spectra | 750-850 | |
| (1) With engine at normal operating temperature and all electrical loads off. | ||
| (1) | With engine at normal operating temperature and all electrical loads off. |
IDLE SPEED SPECIFICATIONS
Scheme 1
Scheme 2
IDLE MIXTURE
Note. Mixture is computer-controlled and is not adjustable.
Optima & Magentis (Canadian) 2.4L
Note. Throttle Position (TP) sensor is adjustable only on Optima & Magentis (Canadian), Sedona and Sorento models. Perform adjustment if necessary.
Note. A poorly functioning TP sensor may cause several driveability problems. For testing and functional check, see SENSORS & SWITCHES in SYSTEMS & COMPONENT TESTING article.
Note. Cleaning of the throttle body may be necessary before any adjustments are made.
Turn ignition off. While backprobing TP sensor 3-pin harness connector, connect a digital voltohm meter (DVOM) set to volts, between TP sensor terminals No. 1 and No. 3. (Scheme 3)and (Scheme 4). Turn ignition on. Do not start engine. Measure voltage with throttle in idle position. Voltage should be 300-900 millivolts. With throttle fully open, voltage should be 4.0-4.6 volts. If voltage is not as specified, loosen TP sensor mounting bolts and adjust by turning the TP sensor. TP sensor is turned clockwise to increase output voltage. Make adjustments with throttle in idle position. (Scheme 5) After adjustment, tighten TP sensor mounting bolts to 14-22 INCH lbs. (1.5-2.5 N.m). If problem still exists, replace TP sensor and repeat test.
Scheme 3
Scheme 4
Scheme 5
Optima & Magentis (Canadian) 2.7L
Turn ignition off. Disconnect TP sensor 3-pin harness connector. Connect a digital voltohm meter (DVOM) set to ohms, between TP sensor terminals No. 2 and 3. (Scheme 6) Insert a 0.0256" (0.65mm) thick feeler gauge between the fixed SAS and throttle lever. (Scheme 7) Loosen TP sensor mounting bolts and turn fully counter clockwise. In this position check there is continuity between terminals No. 1 and 2. Slowly turn TP sensor clockwise until no continuity exists between terminals No. 2 and 3. Tighten mounting bolts to 14-22 INCH lbs. (1.5-2.5 N.m), reconnect sensor connector. Backprobing TP sensor harness connector, connect a DVOM between TP sensor terminals No. 1 (sensor output) and No. 2 (sensor ground). (Scheme 8) Turn ignition on. Do not start engine. Measure voltage with throttle in idle position. Voltage should be 250-800 millivolts. If voltage is not as specified, replace TP sensor and repeat test. Remove feeler gauge after adjustments. Turn ignition off.
Scheme 6
Scheme 7
Scheme 8
Turn ignition off. While backprobing sensor harness connector terminals No.1 (sensor ground) and No. 2 (sensor output) on Sedona, or connector terminals No. 1 (sensor ground) and No. 3 (sensor output) on Sorento with a DVOM set to volts. (Scheme 9)and (Scheme 10). Turn ignition on. Do not start engine. Check that TP Sensor output voltage is as specified. Voltage should be 300-900 millivolts. If it is out of specification, loosen TP Sensor mounting screws and adjust by turning TP sensor. Turning TP sensor clockwise increases the output voltage. Make adjustments with throttle in idle position. Tighten the screws securely after adjustment. Turn ignition off. If problem still exists, replace TP Sensor and repeat test.
