Mazda RX-8 Manual page 144

NOTE:
The following test is for
•
engine stalling with A/C
on concern. If other
symptoms exist, go to the
next step.
Connect the pressure gauge to the
A/C low and high side pressure
lines.
Turn the A/C on and measure the
low side and high side pressures.
Are pressures within the
specifications?
(See REFRIGERANT
PRESSURE CHECK .)
Inspect for A/C cut-off
operation.
(See A/C Cut-off Control System
20
Inspection .)
Does the A/C cut-off work
properly?
Disconnect the vacuum hose
between the purge solenoid valve
and the intake manifold at the
quick release connector.
Plug the opening end of the
21
vacuum hose.
Drive the vehicle.
Does the engine condition
improve?
Perform the metering oil pump
control inspection.
(See Metering Oil Pump Control
22
Inspection .)
Does the metering oil pump
control properly?
If the A/C is always on, go to symptom
troubleshooting "No.24 A/C is always on or
A/C compressor runs continuously".
(See NO.24 A/C IS ALWAYS ON OR A/C
COMPRESSOR RUNS CONTINUOUSLY
No .)
For other symptoms, inspect the following:
Refrigerant charging amount
•
Condenser fan operation
•
Yes Go to the next step.
No Inspect A/C cut-off system components. the
Inspect if the purge solenoid valve is stuck
open mechanically.
Yes
Inspect the evaporative emission control
system.
No Go to the next step.
Yes Go to the next step.
Repair or replace the malfunctioning parts,
No according to the metering oil pump
inspection results.
(w) RX8-Engine Troubleshooting
Page 95