Mazda MX-5 Miata Sport 2007 Manual page 2006

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
correct with ignition
switch to ON position?
(See FUEL LINE
PRESSURE
INSPECTION [LF] .)
11 Inspect variable intake
air control operation.
(See VARIABLE
INTAKE AIR
CONTROL
OPERATION
INSPECTION .)
Does VIS function
properly?
12
NOTE:
The following

test is for
engine stalling
with the A/C on
concern. If other
symptoms exist,
go to the next
step.
Connect pressure gauge
to the A/C low and high
side pressure lines.Turn
the A/C on and measure
low side and high side
pressures.Are pressures
within specifications?
(See REFRIGERANT
PRESSURE
CHECK .)
13 Inspect for A/C cut-off
operation.
(See A/C Cut-off
Control System
Inspection .)
Does the A/C cut-off
function properly?
14 Disconnect the vacuum
hose between the purge
solenoid valve and the
intake manifold from
purge solenoid valve
side.
2007 Mazda MX-5 Miata Sport
Yes
No
Yes
No
Yes
No
Yes
Replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION
[LF] .)
Go to the next step.
Repair or replace the
malfunctioning part.
Go to the next step.
If 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
[LF] .)
For other symptoms, inspect the
following:
Refrigerant charging

amount
Condenser fan operation

Go to the next step.
Inspect A/C cut-off system
components.
Inspect if purge solenoid valve
is stuck open mechanically.
Inspect the evaporative emission
control system.
(See PURGE CONTROL
SYSTEM INSPECTION .)