Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL KL]
4 Grayish white with all plugs
[TROUBLESHOOTING HINTS]
© Air/fuel mixture-too lean
Warning
Following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following
warnings before performing fuel system service:
• Fuel vapor is hazardous, it can easily ignite, causing serious injury and damage. Always keep sparks and flames
away from fuel.
• Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel
can also irritate skin and eyes. To prevent this, always complete “BEFORE REPAIR PROCEDURE” and “AFTER
REPAIR PROCEDURE” described in this manual.
c r 0 1 -1 4 BEFORE REPAIR PROCEDURE
D- 0 1 -1 4 AFTER REPAIR PROCEDURE
STEP INSPECTION
ACTION
1 When engine cannot be started, check
intake-air system for air leakage.
When engine can be started, carry out intake
manifold vacuum inspection.
Is air sucked in from intake-air system?
Yes Repair or replace.
No
Go to next step.
2 Carry out fuel pressure inspection.
Is fuel pressure correct?
Fuel line pressure
260— 310 kPa {2.6— 3.2 kgf/cm2,
37— 46 psi} at ignition switch ON
Yes Check following PID.
• MAF PID.
vr 01-40B MASS AIR FLOW SENSOR INSPECTION
[KL]
• ECT PID.
et
- 01-40B ENGINE COOLANT TEMPERATURE
SENSOR INSPECTION [KL]
• H02S11, H 02S12, H 02S21, H 02S13 PID.
c r 01-40B HEATED OXYGEN SENSOR INSPECTION
[KL]
• (When engine can be started).
• Check for PCM ground condition.
No Repair or replace.
ENGINE SYSTEM INSPECTION [KL]
Intake Manifold Vacuum Inspection
1. Verify air intake hoses are installed properly.
2. Start the engine and run at idle.
3. Measure the intake manifold vacuum by using a
vacuum gauge.
Specification
Less than -6 0 kPa {-450 mmHg, -1 8 inHg}
W6U101W08
4. If not as specified, check following.
• Air suction at:
Throttle body installation point.
Intake manifold installation point.
PCV valve installation point.
• Fuel injector insulator.
• Accelerator cable free play.
• Engine compression (Refer to 0 1 -0 1 B
COMPRESSION INSPECTION [KL],
Fuel Injector Operation Inspection
1. Warm up the engine and run at idle (or cranking if
it does not start.)
2. Listen for the operational sound of each fuel
injector with a soundscope.
Note
• Compare the sound of each fuel injector
because of the difficulty of verifying the sound
of individual fuel injectors.
0 1 -0 1 B -1 76