Fuel Pressure Test
WARNING: This page is about a different car, the 2003 Suzuki XL-7, 2003 Suzuki Vitara, 2003 Suzuki Grand Vitara, and 2003 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
- Release fuel system pressure. See RELIEVING FUEL PRESSURE
. Remove fuel delivery feed hose from fuel delivery pipe (plug for Vitara). Install fuel pressure gauge between fuel delivery feed hose and fuel delivery pipe (plug for Vitara). See Fig 1
.
- Verify battery voltage is 11 volts or greater. Turn ignition switch to ON position to operate fuel pump for 3 seconds. Turn ignition switch to OFF position. Repeat 3-4 times, and check fuel pressure. See FUEL PUMP PERFORMANCE
table. Start engine and allow it to reach normal operating temperature. Measure fuel pressure at idle. See REGULATED FUEL PRESSURE
table. Turn ignition switch to LOCK position.
- If pressure is not within specification, check for faulty fuel pump, pressure regulator or restriction in fuel system. See B-4: FUEL PRESSURE INSPECTION
under CIRCUIT TESTS. Repair as necessary. Release fuel pressure, See RELIEVING FUEL PRESSURE
. Remove fuel pressure gauge and reinstall fuel delivery feed hose (plug with new gasket for Vitara, tighten to 22 ft. lb.). Start engine. Ensure no fuel leaks are present.
Courtesy of SUZUKI OF AMERICA CORP. FUEL PUMP PERFORMANCE
| Application |
psi (kg/cm2
) |
| Aerio, Grand Vitara & XL-7 |
38.4-44.0 (2.7-3.1) |
| Vitara |
35.6-42.7 (2.5-3.0) |
REGULATED FUEL PRESSURE
| Application |
psi (kg/cm2
) |
| Aerio |
31.3-36.9 (2.2-2.6) |
| Grand Vitara, Vitara & XL-7 |
29.8-37.0 (2.1-2.6) |