Short check connector
terminal F/P to body
GND using a jumper
wiring.
Turn the ignition switch
to the ON position.
Is fuel line pressure
correct with ignition
switch ON?
(See
FUEL LINE
PRESSURE
INSPECTION [LF]
.)
Inspect the fuel line for
clogging.
If there is no malfunction,
replace the fuel pump unit.
(See
FUEL PUMP UNIT
REMOVAL/INSTALLATION
[LF]
.)
High:
Replace the fuel pump unit.
(See
FUEL PUMP UNIT
REMOVAL/INSTALLATION
[LF]
.)
21
Visually inspect for fuel
leakage at fuel injector
O-ring and fuel line.
Service if necessary.
Is fuel line pressure
held after ignition
switch is turned off?
(See
FUEL LINE
PRESSURE
INSPECTION [LF]
.)
Yes
Go to the next step.
No
Inspect the fuel injector.
If the fuel injector is normal,
replace the fuel pump unit.
(See
FUEL PUMP UNIT
REMOVAL/INSTALLATION
[LF]
.)
22
Connect pressure
gauges to A/C low and
high pressure side
lines.Turn A/C on and
measure low side and
high side pressures.Are
pressures within
specifications?(See
REFRIGERANT
PRESSURE
CHECK
.)
NOTE:
The following
test is for stall
concerns with
the A/C on. If
other symptoms
exist, go to the
next step.
Yes
Go to the next step.
No
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
23
Disconnect the vacuum
hose between the purge
solenoid valve and the
intake manifold from
purge solenoid side.
Yes
Inspect if purge solenoid valve
is stuck open.
Inspect evaporative emission
control system.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:09 PM
Page 34
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