Mazda 1983 RX7 - Fuel Pump - Electric; Pressure Test; Volume Test

FUEL PUMP - ELECTRIC
Article Text
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 05:54PM
ARTICLE BEGINNING
1983 Electric Fuel Pump
MAZDA
RX7, Pickup
DESCRIPTION & OPERATION
Electric fuel pump is mounted near fuel tank on frame member.
Power is supplied when ignition switch is in the "RUN" position. This
circuit is protected by a 15-amp fuse (20-amp on RX7) at fuse panel.
In-line fuel filter must be changed within recommended mileage
interval before performing tests. If in doubt, install new filter.
TESTING
PRESSURE TEST
1) Remove air cleaner assembly and disconnect fuel line at
carburetor. Connect pressure gauge with restrictor and a flexible
hose. See Fig. 1. Turn ignition on and briefly vent the system into
container by opening hose restrictor.
2) Pressure should stabilize at 2.8-3.6 psi (.19-.25
kg/cm ý ). If not within specifications, and lines and filter are in
satisfactory condition, replace pump.
Fig. 1: Fuel Pump Pressure and Volume Test
VOLUME TEST
With fuel pressure within limits, open restrictor for one
minute and measure fuel expelled. If not within specifications, check
for restrictions in tank, line or filter. Replace pump if required.
FUEL PUMP VOLUME
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
Volume
Application Qt./Min. (cc/Min.)