Mazda RX-8 Manual page 141

Visually inspect the eccentric
shaft position sensor and the teeth
of the pulse wheel.
Are the eccentric shaft position
sensor and the teeth of the pulse
wheel normal?
Is a strong blue spark visible at
8 each disconnected high-tension
lead while cranking the engine?
Inspect the spark plug condition.
9
Is the spark plug wet, covered
with carbon or grayish white?
Perform the drive-by-wire
control system operation
inspection.
10
(See Drive-by-wire Control
System Inspection .)
Does the drive-by-wire control
system work properly?
No Replace the malfunctioning parts.
Inspect for the following:
Spark plugs malfunction
•
Spark plugs heat range
•
Pulse wheel damaged on eccentric
•
shaft
Yes Open or short circuit on eccentric
•
shaft position sensor
Open or short between eccentric shaft
•
position sensor and PCM terminal 2U
or 2X
If they are normal, go to the next step.
Inspect for the following:
No High-tension leads
•
Ignition coils or connectors
•
Spark plug is wet or covered with
carbon:
Inspect for fuel leakage from the fuel
injector.
Yes
Inspect the spark plug and the high-tension
lead.
Spark plug is grayish white:
Inspect for clogged fuel injector.
Install the spark plugs on original rotors.
No
Go to the next step.
Yes Go to the next step.
Repair or replace the malfunctioning part
No according to the drive-by-wire control system
operation inspection results.
(w) RX8-Engine Troubleshooting
Page 92