Engine Controls - On-Vehicle Adjustments: Other Mazda MPV II

ENGINE MECHANICAL

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

Miata, Protege & 626 2.0L

1. Ensure engine is cold. Remove valve cover. Rotate crankshaft clockwise until No. 1 piston is at TDC of compression stroke. Measure valve clearance between base of camshaft lobe and valve tappets at "A". (Scheme 3) See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) table. If clearance is as specified, record valve location and clearance reading. Go to next step.
2. Rotate crankshaft clockwise about 360 degrees positioning No. 4 piston at TDC of compression stroke. Measure valve clearance between base of camshaft lobe and valve tappets at "B". (Scheme 3) See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) table. If clearance is not within specification, Go to next step.
3. Turn crankshaft clockwise so that camshaft lobe on valve requiring clearance adjustment is positioned straight up, away from valve. Remove appropriate camshaft cap bolts as necessary. (Scheme 4) See «CAMSHAFT BOLT REMOVAL»(ref-11543-S14598294492000111700000) table. NOTE: For No. 2 and 3 cylinder exhaust valve adjustment shim removal, remove bolt "A" or "C". For No. 2 and 3 cylinder intake valve adjustment shim removal, remove bolt "B" or "D".
4. Assemble Adjustment Tool Shaft, Clamp and Bolt (49-T012-002, 49-T012-003 and 49-T012-004), aligning marks on adjustment tools. (Scheme 5) Install shaft and clamp on appropriate camshaft using camshaft cap bolts. (Scheme 4) Tighten cap bolts to 100-126 INCH lbs. (11.3-14.2 N.m). (Scheme 6)or (Scheme 7). Tighten clamp bolt to secure shaft. (Scheme 5)
5. Mount body on shaft at point of adjustment shim to replaced. (Scheme 6)or (Scheme 7). Position notch of tappet so that thin-bladed screwdriver can be inserted. (Scheme 8)or (Scheme 9). Set body on tappet and align by its notch. Tighten short bolt to secure body to shaft. CAUTION: Use caution when depressing tappet. Cylinder head can be damaged by body tip when tappet is depressed.
6. Tighten long bolt on body to depress tappet. Using thin-bladed screwdriver, pry up on adjustment shim through notch on tappet. Using a magnet, remove shim and measure shim thickness. Select proper adjustment shim to obtain clearance within specification. Push selected shim into tappet. Loosen long bolt to allow tappet to move up. Loosen short bolt and remove body. Remove shaft and clamp. Install camshaft cap bolts and tighten to 100-126 INCH lbs. (11.3-14.2 N.m). Recheck valve clearance.

VALVE CLEARANCE SPECIFICATIONS

CAMSHAFT BOLT REMOVAL

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

1. Ensure engine is cold. Remove intake manifold and valve covers. See REMOVAL, OVERHAUL & INSTALLATION article. Rotate crankshaft clockwise until No. 1 piston is at TDC of compression stroke. Measure valve clearance between camshaft lobe and valve tappet of both banks at "A". (Scheme 10) If clearance is not within specification, record clearance and location of valve. Go to next step. See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) table.
2. Rotate crankshaft clockwise about 240 degrees positioning No. 3 piston at TDC of compression stroke. Measure valve clearance between base of camshaft lobe and valve tappet of both banks at "B". (Scheme 10) If clearance is not within specification, record clearance and location of valve. Go to next step. See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) table.
3. Rotate crankshaft clockwise about 240 degrees positioning No. 5 piston at TDC of compression stroke. Measure valve clearance between base of camshaft lobe and valve tappet of both banks at "C". (Scheme 10) If clearance is not within specification, record clearance and location of valve. Go to next step. See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) table.
4. Turn engine clockwise until camshaft lobe of valve requiring adjustment is pointing straight up. Remove appropriate camshaft cap bolts for valves requiring adjustment. See «CAP BOLT IDENTIFICATION»(ref-11543-S20191996842000111700000) table. CAP BOLT IDENTIFICATION Cap Bolts (1) Application No. 1 Right Cylinder Head Exhaust Valves No. 2 Right Cylinder Head Intake Valves No. 3 Left Cylinder Head Exhaust Valves No. 4 Left Cylinder Head Intake Valves (1) (Scheme 11)
5. Assemble Adjustment Tool Shaft, Clamp and Bolt (49-T012-002, 49-T012-003 and 49-T012-004), aligning marks on adjustment tools. (Scheme 5) Install shaft and clamp on appropriate camshaft using camshaft cap bolts. Tighten cap bolts to 99-125 INCH lbs. (11.3-14.2 N.m). Align bolts to secure shaft after alignment.
6. Rotate notch in tappet so small screwdriver can be inserted. Position tappet holder body (over tappet that requires shim replacement. Tighten holder body to shaft. Tighten holder bolt to compress tappet.
7. Using small screwdriver, pry shim from tappet. Using magnet, remove shim. Measure shim. Change to appropriate shim thickness to meet valve clearance specification.
8. Loosen bolt compressing tappet. Remove tappet holder assembly. Reinstall camshaft cap bolts and tighten to specification. Recheck valve clearance. Install valve cover with NEW gasket. Install intake manifold. See REMOVAL, OVERHAUL & INSTALLATION article.

Scheme 11

Tribute 2.0L

1. Ensure engine is cold. Remove right front wheel and lower splash shield. Remove valve cover. Remove drive belt and timing covers. Remove timing belt. See appropriate vehicle in ENGINES.
2. Using feeler gauge, measure valve clearance between base of camshaft lobe and valve tappets. Record measurements of all valve tappets and location. If any tappets are not within specification, go to next step. See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) . If clearances are as specified, go to step 4 . NOTE: Select NEW tappet by adding measured clearance plus base tappet thickness minus most desirable clearance.
3. Remove appropriate camshaft for valves requiring adjustment. Remove appropriate tappet and measure thickness of tappet. Install NEW tappets and reinstall camshafts. Ensure valve clearances are as specified. See «VALVE CLEARANCE SPECIFICATIONS»(ref-11543-S17706330752000111700000) .
4. Align camshaft timing marks and reinstall timing belt. See appropriate ENGINES article. To complete repair, reverse removal procedure. Install NEW valve cover gasket .

CRANKSHAFT POSITION (CKP) SENSOR

Note. On all models except Miata and Protege 1.6L, CKP sensor is not adjustable. If clearance is not as specified, replace CKP sensor or crankshaft pulley.

MIATA & PROTEGE 1.6L

Loosen CKP sensor bolt. Using feeler gauge, adjust air gap between sensor and crankshaft sensor plate projections to.020-0.59" (0.5-1.5 mm). (Scheme 12) Tighten CKP sensor bolt. If clearance is still not within specification, replace CKP sensor or sensor plate behind crankshaft pulley.

Scheme 12

IGNITION TIMING

Note. Before adjusting or inspecting ignition timing, warm engine to normal operating temperature. Turn off all accessories. Place transmission in Neutral (M/T) or Park (A/T). Wait for cooling fan to stop. Ensure idle speed is correct. See IDLE SPEED under IDLE SPEED & MIXTURE.

Note. New Generation Star (NGS) scan tool is used to perform following procedures.

MIATA, MILLENIA, MPV & PROTEGE

Note. On Millenia 2.3L, ignition timing is not adjustable.

Scheme 13

1. Connect NGS scan tool to DLC-2 located under left side of instrument panel, right of steering column. (Scheme 14) Connect a jumper wire between terminals TEN and GND at DLC-1 in engine compartment. (Scheme 15)
2. Ensure idle speed is correct. See «IDLE SPEED»(ref-11543-S24360077182000111700000) under IDLE SPEED & MIXTURE. On all models except Millenia 2.3L, connect timing light to high-tension lead No. 1. On Millenia 2.3L, connect Inductive Timing Light (49-T018-002) lead to ignition timing checking harness (Black/White wire) located next to engine compartment relay box. (Scheme 13) Start engine and allow it to idle. Check timing. See «IGNITION TIMING SPECIFICATIONS»(ref-11543-S13251819672000111700000) table. (Scheme 16) NOTE: Standard inductive timing light may not work on ignition timing checking harness. Recommend using manufacturers Inductive Timing Light (49-T018-002) or equivalent.
3. On all models except Millenia 2.5L, if ignition timing is not within specification, check CMP sensor, CKP sensor, TP sensor, ECT sensor and transmission range switch. See appropriate SYSTEM & COMPONENT TESTING article. If all sensors and switches are okay, replace PCM.
4. On Millenia 2.5L, if ignition timing is not within specification, loosen distributor lock bolt. Rotate distributor until timing marks align. Tighten lock bolt. Recheck timing.

626

1. Connect NGS scan tool to DLC-2 located under left side of instrument panel, left of steering column. (Scheme 14) Ensure idle speed is correct. See «IDLE SPEED & MIXTURE»(ref-11543-S00798329002000111700000).
2. Connect timing light to high-tension lead No. 1 and check timing. (Scheme 16) See «IGNITION TIMING SPECIFICATIONS»(ref-11543-S13251819672000111700000) table. If ignition timing is not within specification, check CMP sensor, CKP sensor, TP sensor, ECT sensor, neutral switch, clutch switch and transmission range switch. See SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE & 626 article. If all sensors and switches are okay, replace PCM.

IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM)

Scheme 14

Scheme 15

Scheme 16

IDLE SPEED & MIXTURE

Note. Idle mixture is not adjustable. If idle mixture is incorrect, see appropriate SELF-DIAGNOSTICS article.

Note. New Generation Star (NGS) scan tool is used to perform following procedures.

COLD (FAST) IDLE SPEED

Note. Fast idle speed is computer controlled and is not adjustable.

IDLE SPEED

Note. Before adjusting idle speed, warm engine to normal operating temperature. Turn off all accessories. Place transmission in Neutral (M/T) or Park (A/T). Wait for cooling fan to stop. DO NOT adjust idle using throttle adjusting screw. Throttle adjusting screw is preset and if adjusted, will adversely affect engine performance.

1. Connect NGS scan tool to DLC-2 located under left side of instrument panel, left of steering column on Miata, MPV and Protege, right of steering column on Millenia. (Scheme 14) Connect a jumper wire between terminals TEN and GND at DLC in engine compartment. (Scheme 15)
2. Start engine and allow it to idle. Turn off all electrical loads. Using NGS scan tool, select PID/DATA MONITOR AND RECORD and monitor RPM. If idle speed is not within specification, rotate air adjusting screw on throttle body. (Scheme 17) See «IDLE SPEED SPECIFICATIONS»(ref-11543-S22951408322000111700000) table.

1. Connect NGS scan tool to DLC-2 located under left side of instrument panel, left of steering column. (Scheme 14) Start engine and allow it to idle. Using NGS scan tool, select PID/DATA MONITOR AND RECORD.
2. Select RPM and press trigger. Select START. See «IDLE SPEED SPECIFICATIONS»(ref-11543-S22951408322000111700000) table. If idle speed is not within specification, select HDLMP under PID/DATA MONITOR AND RECORD. Trigger function. Verify HDLMP status changes from OFF to ON when operating stalk switch (passing position). If HDLMP status changes, go to next step. If HDLMP status does not change, see appropriate STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.
3. Connect inductive-type tachometer. Select DIAGNOSTIC TEST MODES. Trigger function. Select KOER ON-DEMAND SELF-TEST. Trigger function. Operate stalk switch to high beam (passing) position. Once NGS scan tool displays FOR EXAMPLE BOO, PSP AND TCS, wait 2 seconds and switch head lights to low beam. Repeat process 2 more times. Within 2 minutes, adjust idle speed to specification. (Scheme 17) See «IDLE SPEED SPECIFICATIONS»(ref-11543-S22951408322000111700000) table.

IDLE SPEED SPECIFICATIONS

Scheme 17

THROTTLE POSITION (TP) SENSOR

Note. DO NOT adjust throttle adjusting screw. Throttle adjusting screw is preset and if adjusted, will adversely affect engine performance.

Note. New Generation Star (NGS) scan tool is used to perform following procedures.

MILLENIA 2.3L

Closed throttle position switch is part of TP sensor, which is adjusted automatically when TP sensor is adjusted. See THROTTLE POSITION (TP) SENSOR .