Mazda RX8 - Knock Sensor (Ks)

Yes
Inspect for the following:
• Spark plugs malfunction
• Spark plugs heat range
• Pulse wheel damaged on eccentric shaft
• Open or short circuit on eccentric shaft
position sensor
• Open or short circuit between eccentric shaft
position sensor and PCM terminal 2U or 2X
If they are normal, go to the next step.
6
Is the strong blue spark visible at
each disconnected high-tension lead
while cranking the engine?
No
Inspect for the following:
• High-tension leads
• Ignition coils or connectors
Yes Go to the next step.
7
Inspect the knock sensor.
(See KNOCK SENSOR (KS)
INSPECTION .)
Is the knock sensor normal?
No
Replace the knock sensor.
(See KNOCK SENSOR (KS)
REMOVAL/INSTALLATION .)
Yes Go to Step 14.
8
Inspect the engine compression.
(See COMPRESSION INSPECTION
.)
Is it normal?
No Go to the next step.
Yes Go to the next step.
9
Perform the metering oil pump
control inspection.
(See Metering Oil Pump Control
Inspection .)
Does the metering oil pump control
operate properly?
No
Repair or replace the malfunctioning part according
to the inspection results.
After that overhaul or replace the engine.
(See Engine Workshop Manual.)
Yes
Replace the engine oil.
Inspect the ECT sensor and the related wiring
harnesses.
(See ENGINE COOLANT TEMPERATURE (ECT)
SENSOR INSPECTION .)
After that overhaul or replace the engine.
(See Engine Workshop Manual.)
10
Check the engine oil condition.
Is the engine oil low viscosity and/or
is there a gasoline odor?
No Go to the next step.
11 Inspect the oil pressure. Yes Go to the next step.
(w) RX8-Engine Troubleshooting
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