Mazda RX-8 Workshop Manual page 784

1 Are any drivability or exhaust
smoke concerns present?
2 Inspect the following:
Electrical
connections
Vacuum lines
Fuel quality
Are all items normal?
3 Turn the ignition switch to the
ON position (engine off).
Retrieve any DTCs using the M-
MDS.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Are there any DTCs displayed?
4 Disconnect the fuel line quick
release connector and install the
fuel gauge to the fuel line.
Start the engine and run it at
idle.
Is the fuel line pressure correct
at idle?
(See FUEL LINE PRESSURE
INSPECTION [13B-MSP].)
Yes Go to the applicable flow chart.
(See SYMPTOM DIAGNOSTIC INDEX
No Go to the next step.
Yes Go to the next step.
No Service if necessary.
Repeat Step 2.
Yes Go to the applicable DTC inspection.
(See DTC TABLE
No Go to the next step.
Yes Go to the next step.
No Zero or low:
Inspect the fuel pump relay and the fuel
pump circuit.
Inspect for clogged fuel line.
High:
Replace the fuel pump unit.
(See
REMOVAL/INSTALLATION
[13B-MSP].)
[13B-MSP].)
If normal, replace the
fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION
[13B-MSP].)
FUEL PUMP UNIT
[13B-MSP].)