NO.7 SLOW RETURN TO IDLE
7 SLOW RETURN TO IDLE
DESCRIPTION The engine takes more time than normal to return to idle speed.
POSSIBLE CAUSE
• ECT sensor malfunction
• The thermostat is stuck open.
• Throttle body malfunction
• Air leakage from intake-air system
• Eccentric shaft bypass valve stuck open
Diagnostic procedure
STEP INSPECTION RESULTS ACTION
Yes
DTC is displayed:
Go to the applicable DTC inspection.
(See DTC TABLE .)
1
Connect the WDS or equivalent to the
DLC-2.
Turn the ignition switch to the ON position
(Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
No
No DTC is displayed:
Go to the next step.
2
Remove the thermostat and inspect
operation.
Yes
The ECT and the thermostat are normal.
Go to the next step.
(w) RX8-Engine Troubleshooting
Page 53
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