Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 173 (ENGINE CONTROL SYSTEM TESTING & ENGINE COMPONENT TESTING)FUEL SYSTEMS (GASOLINE)INJECTOR LEAK TEST (2.2L SATURN)
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Injector Leak Test (2.2L SATURN)
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Injector Leak Test (2.2L SATURN)
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn SL2, 2002 Saturn SL1, 2002 Saturn SL, 2002 Saturn SC2, and 2002 Saturn SC1. However, it is still accessible from the selected car via links, so may be relevant.
- Remove air cleaner inlet tube.
- Relieve fuel system pressure. See FUEL SYSTEM PRESSURE RELIEF (SATURN) under BASIC FUEL SYSTEM CHECKS in BASIC DIAGNOSTIC PROCEDURES - CARS - EXCEPT PRIZM.
- Connect Pressure Gauge Adapter (309725) to fuel pressure test port.
- Remove fuel line attachment screw and fuel lines from clamp.
- Remove fuel rail assembly. Pull fuel rail back far enough so that nozzles of injectors are visible but still in ports. Attach fuel rail to intake manifold with wire.
- Connect fuel pressure gauge bar to pressure adapter.
- Wipe tips of fuel injectors free of any fuel or debris. Place a clean White towel directly under fuel injectors. Ensure towel lightly contacts each fuel injector tip.
- Connect scan tool and turn ignition On. Battery must be at a minimum of 12 volts when performing any fuel system test. Charge battery before proceeding if below 12 volts.
- Using the scan tool, energize fuel pump.
- Observe fuel injector tips for leakage of fuel. If one or more of White towels becomes wet with fuel after five minutes, replace faulty fuel injector. Pressure gauge reading should be approximately 50-60 psi (345-414 kPa).
- Test assembly a minimum of two times.
- Install bleed hose from Pressure Test Adapter (309725) into an approved container.
- Open valve to bleed system pressure.
- Remove fuel pressure adapter from fuel pressure test port.
- Install fuel pressure test port cap.
- Lubricate injector "O" rings with clean engine oil and install fuel rail assembly.
- Start engine and check for leaks.
NOTE:
Lay shop towels on intake manifold and cam cover to collect any fuel. Make sure the injectors a positioned to prevent fuel from being sprayed onto the engine. Make sure that the injector retaining clips are properly installed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.