Engine Performance Adjustments - 1.8L Toyota Celica T200 рестайлинг

ENGINE MECHANICAL

Note. References to California models applies to California emission vehicles, which may be verified by underhood Emission Control label. California emissions may be available in other states.

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

VALVE CLEARANCE

Note. Check and adjust valve clearance with engine cold.

1. Remove valve cover and gasket. Rotate crankshaft clockwise until timing mark on crankshaft pulley aligns with "0" mark on front cover and cylinder No. 1 (front cylinder at timing belt end of engine) is at TDC on compression stroke.
2. Ensure valves on cylinder No. 1 are closed and hole in camshaft sprocket aligns with mark on top of camshaft bearing cap. If valves are not closed and camshaft sprocket is not properly positioned, rotate crankshaft clockwise 360 degrees (one full revolution). With cylinder No. 1 at TDC, check valve clearance on specified valves. See «VALVE CLEARANCE ADJUSTMENT SEQUENCE»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table. (Scheme 1)
3. Using feeler gauge, measure and record valve clearance between valve lifter and camshaft. Ensure valve clearance is within specification. See «VALVE CLEARANCE SPECIFICATIONS»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table.
4. To check remaining valves, rotate crankshaft clockwise 360 degrees (one full revolution) until cylinder No. 4 is at TDC on compression stroke. Measure valve clearance on specified valves. See «VALVE CLEARANCE ADJUSTMENT SEQUENCE»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table.
5. If valve clearance on intake valve requires adjustment, manufacturer states to remove intake camshaft for access to adjusting shim. See appropriate article in the ENGINES section.
6. If valve clearance on exhaust valve requires adjustment, rotate crankshaft so camshaft lobe on valve to be adjusted is facing upward, away from valve lifter. Rotate valve lifter so notch area on valve lifter is toward front of vehicle.
7. Valve Clearance Adjuster (SST 09248-55040) is used for adjusting valve clearance. Press valve lifter downward using SST "A" of valve clearance adjuster. (Scheme 2) Install SST "B" between camshaft and valve lifter. Remove SST "A".
8. On all valve applications, use small screwdriver and magnet to remove adjusting shim. Using micrometer, measure thickness of adjusting shim removed. Using measured clearance and adjusting shim thickness, determine correct thickness of adjusting shim to be used. (Scheme 3)and (Scheme 4). Install adjusting shim. Recheck valve clearance. NOTE: Before installing valve cover gasket, apply sealant at camshaft bearing cap-to-cylinder head surfaces and semi-circular plug-to-cylinder head surfaces where valve cover gasket seals.
9. Install valve cover using NEW gasket. To install remaining components, reverse removal procedure.

VALVE CLEARANCE ADJUSTMENT SEQUENCE

VALVE CLEARANCE SPECIFICATIONS

Scheme 1

Scheme 2

Scheme 3

Scheme 4

IGNITION TIMING

1. Start and warm engine to normal operating temperature. Shut engine off. Connect timing light to spark plug wire on cylinder No. 1 (front cylinder at timing belt end of engine). Remove cover (if equipped) and connect scan tool to data link connector No. 3. (Scheme 5) Scan tool is used to read engine RPM.
2. Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 on data link connector No. 1. (Scheme 6) Data link connector No. 1 is located at driver's side rear corner of engine compartment.
3. Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at specified RPM for 5 seconds and then ensure engine returns to idle. See «ENGINE RPM SPECIFICATIONS»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table. ENGINE RPM SPECIFICATIONS Application Engine RPM 1.8L 1000-1500 NOTE: Timing marks are located on front cover.
4. Ensure base timing is within specification at idle with transaxle in Neutral, and with A/C and all accessories off. See «IGNITION TIMING»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table.
5. Remove jumper wire from data link connector No. 1. Ensure ECM controlled timing is within specification. See «IGNITION TIMING»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table. Shut engine off. Remove jumper wire, timing light and scan tool.

IGNITION TIMING (Degrees BTDC @ Idle) (1)

Scheme 5

Scheme 6

IDLE SPEED & MIXTURE

Note. Mixture adjustment is not possible.

IDLE SPEED

Note. Check and adjust idle speed with air cleaner installed, all air intake system hoses and vacuum lines connected, electronic fuel injection system wiring connectors properly installed, transmission/transaxle in Neutral, ignition timing properly set, electric cooling fan off (if equipped), A/C and all accessories off, and engine at normal operating temperature.

1. Start and warm engine to normal operating temperature. Shut engine off. Remove cover (if equipped) and connect scan tool to data link connector No. 3. (Scheme 5) Scan tool is used to read engine RPM.
2. Apply parking brake. Place transmission/transaxle in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle. Ensure idle speed is within specification. See «IDLE SPEED SPECIFICATIONS»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table.
3. If idle speed is not within specification, check Idle Air Control (IAC) valve, wiring and Electronic Control Module (ECM). See IDLE CONTROL SYSTEM in «SYSTEM/COMPONENT TESTS - 1.8L»(ref-22317) article. Shut engine off. Remove scan tool.

IDLE SPEED SPECIFICATIONS (1)

THROTTLE POSITION SENSOR

1. Disconnect electrical connector from Throttle Position (TP) sensor. Loosen TP sensor mounting screws. Connect ohmmeter between terminals IDL and E2. (Scheme 7)
2. Apply vacuum to throttle opener (if equipped). To set initial clearance, insert proper thickness feeler gauge between throttle stop screw and throttle lever. See «THROTTLE POSITION SENSOR ADJUSTMENT»(/toyota/celica/t200-1995-1999/remont/adjustments/#engine-performance-adjustments-18l) table.
3. Gradually rotate TP sensor clockwise until ohmmeter deflects. Tighten TP sensor mounting screws. Using specified feeler gauge, recheck for continuity and no continuity at adjusted clearances. Disconnect ohmmeter. Install electrical connector on TP sensor.

THROTTLE POSITION SENSOR ADJUSTMENT

Scheme 7

DASHPOT & THROTTLE VALVE OPENER CONTROL SYSTEM

For testing and adjustment procedures, see THROTTLE CONTROLS in SYSTEM/COMPONENT TESTS - 1.8L article.

See also:
• VALVE CLEARANCE ADJUSTMENT SEQUENCE