Mazda MX-5 Miata / Grand Touring. Manual — part 88

2008 ENGINE PERFORMANCE

Emission System - MX-5 Miata

EMISSION SYSTEM LOCATION INDEX [LF]

ENGINE COMPARTMENT SIDE

Fig. 1: Identifying Location Of Emission System Engine Compartment Side Components
Courtesy of MAZDA MOTORS CORP.

EXHAUST SYSTEM

2008 Mazda MX-5 Miata Grand Touring

2008 ENGINE PERFORMANCE Emission System - MX-5 Miata

2008 Mazda MX-5 Miata Grand Touring

2008 ENGINE PERFORMANCE Emission System - MX-5 Miata

Fig. 2: Identifying Location Of Exhaust System Components
Courtesy of MAZDA MOTORS CORP.

FUEL TANK SIDE

Fig. 3: Identifying Location Of Fuel Tank Side Components
Courtesy of MAZDA MOTORS CORP.

FUEL-FILLER CAP INSPECTION [LF]

LEAKAGE INSPECTION

2008 Mazda MX-5 Miata Grand Touring

2008 ENGINE PERFORMANCE Emission System - MX-5 Miata

1. Perform the following SST (Evaporative Emission System Tester 134-01049) self-test:

1. Verify the gas cylinder valve is closed and the control valve located on the tester is in the TEST

position. All tester display should be off at this time.

2. Connect the long hose (part of SST ) to the tester.

3. Connect the manifold assembly (part of SST ) to the long hose as shown in Fig. 4.

Fig. 4: Connecting Manifold Assembly To Long Hose
Courtesy of MAZDA MOTORS CORP.

4. Open the gas cylinder valve and verify the gas cylinder regulator left gauge reads 10 to 12 psi

(preset at factory).



If not, refer to the tester operators manual to contact tester manufacturer.

5. Press the ON/OFF switch to turn on the SST and make sure the left display reads 0.0 .

6. Turn the control valve on the tester to the FILL position.

7. Verify the left display reading is within 13.9 to 14.0 in of water .



If not, adjust the pressure using the regulator knob located on the right side of the tester.

8. Turn the control valve to TEST position and press the START switch.

NOTE:



If the tester does not work correctly during self-test, refer to the
tester operators manual for more detailed procedures.

2008 Mazda MX-5 Miata Grand Touring

2008 ENGINE PERFORMANCE Emission System - MX-5 Miata

9. After the 2-min countdown (left display) is completed, the right display shows the total pressure

loss for that period. A 0.5 in of water loss is acceptable on the self-test.



If the loss is more than 0.5 in of water , do one or more self-test. If the failed test repeats,
check for leak using the ultrasonic leak detector (part of SST ).

2. Press the RESET switch to set the left display reading to 0.0 .

3. Connect the fuel cap receiver assembly (part of SST ) to the manifold assembly and fuel-filler cap from

the vehicle.



If the fuel-filler cap is not a genuine part, replace it.

Fig. 5: Connecting Fuel Cap Receiver Assembly
Courtesy of MAZDA MOTORS CORP.

4. Turn the control valve to the FILL position.

5. Wait (maximum 20s ) until the left display reads 13.9 to 14 in of water.



If the reading is slightly below, adjust it using the regulator knob.



If the reading is far below, the fuel-filler cap has leak. Replace it.

6. Turn the control valve to the TEST position and press the START switch.

7. After the 2-min countdown (left display) is completed, check the test result (the failed/passed light on the

tester).



If the green light turns on, the fuel-filler cap is OK.

2008 Mazda MX-5 Miata Grand Touring

2008 ENGINE PERFORMANCE Emission System - MX-5 Miata