Mazda 3 manuals

Mazda 3 Service Manual: Engine Tune Up [Skyactiv G 2.0]

Mazda 3 Service Manual / Engine / General / Engine Tune Up [Skyactiv G 2.0]

Engine Tune-up Preparation

NOTE:

1. Connect the M-MDS to the DLC-2.


2. Shift the selector lever (ATX) or shift lever (MTX) to the following position:

NOTE:

3. Run the engine speed at a constant 2,500 to 3,000 rpm

and warm up the engine (engine coolant temperature: 80 °C {176 °F}

or more, oil temperature: 60 °C {140 °F}

or more).

4. Turn off all electrical loads with the engine idling.

5. If the cooling fan is operating, wait until is stops.

Idle Speed Inspection

NOTE:

1. Complete the engine tune-up preparation..

2. Verify that the idle speed (M-MDS PID: RPM) is within the specification using the PID/data monitor function of the M-MDS..

Ignition Timing Inspection

NOTE:

1. Complete the engine tune-up preparation..

2. Verify the ignition timing (M-MDS PID: SPARKADV) using the PID/data monitor function of the M-MDS..

3. Verify that ignition timing advances when the engine speed increases gradually.

Idle Mixture Inspection

1. Verify that the idle speed and ignition timing are within the specification..

2. Insert an exhaust gas analyzer into the tailpipe.

3. Verify that the CO and HC concentrations are within regulation.

Idle-up Speed Control Inspection

NOTE:

1. Complete the engine tune-up preparation..

2. Verify that the idle speed according to each load (M-MDS PID: RPM) is within the specification using the PID/data monitor function of the M-MDS (except idle speed decrease after applying load)..

Engine Tune Up [Mzr 2.3 Disi Turbo]
NOTE: If the accelerator pedal is depressed continuously for a specified time, the engine speed may decrease to the idle speed. This is due to the fuel cut control operation, which preve ...

Non Return Valve Inspection [Mzr 2.0, Mzr 2.5]
WARNING: Fuel is very flammable liquid. If fuel spills or leaks from the pressurized fuel system, it will cause serious injury or death and facility breakage. Fuel can also irritate skin ...

Other materials:

A Pillar Trim Removal/Installation
1. Partially peel back the seaming welt. 2. Pull the upper end of the A-pillar trim in the direction of the arrow shown in the figure and remove clip A and B. 3. Cut the lead wire connecting clip B and grommet using a nipper and pull out the A-pillar trim in the direction of the arrow sh ...

Slide Motor Inspection
1. Remove the battery cover.. 2. Disconnect the negative battery cable and wait 1 min or more.. 3. Disconnect the slide motor connector. 4. Apply battery positive voltage to the slide motor terminals and inspect the slide motor operation If not as specified, replace the front sea ...

Power Brake Unit Removal/Installation [Mzr 2.0, Skyactiv G 2.0, Mzr 2.5]
CAUTION: Once the brake switch clearance has automatically been adjusted, it cannot be adjusted again. Therefore, replace the switch with a new one when replacing the power brake unit or performing any procedure that changes the pedal stroke. Secure the steering wheel using tap ...

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