NOTE: Make sure the fuel filter is not clogged before testing
the fuel pump.
Remove the air cleaner assembly. Position an approved fuel container with
a capacity of at least 1 1⁄2 qts.
near the carburetor fuel inlet line.
Disconnect the carburetor fuel inlet line. Turn the ignition switch ON and
allow air to be purged from the system with the line pointed into the container.
Fig. 1: Connect a jumper wire to the "LW" and "BW"
(center) terminals — 1984–85 RX-7
Turn the ignition OFF. Install a pressure gauge, restrictor
and length of fuel-resistant flexible hose into the line.
On 1984–85 RX-7s, unfasten the connector from the fuel pump cut relay
and connect a jumper wire as shown.
Turn the ignition ON. When the pressure has stabilized, note
the reading, then turn the ignition OFF. On 626s, the pressure
should be 5.4 psi (37 kPa). On RX-7s, the pressure should be 3.7–4.7
psi (26–32 kPa) for 1979–82 models, or 2.84–3.55 psi (20–24
kPa) for 1983–85 models.
Detach the pressure gauge from the fuel line and position the line so fuel
will be discharged into the container. Turn the ignition switch ON for
one minute. The volume should be 0.9 qts. for 1983–85 RX-7, or 1.22
qts. for all other cars, including 1979–82 RX-7s.
