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 MANUALSGMC1993JIMMY BASE, 2D UTILITY, 4.3 Z, RWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEREMOVE, OVERHAUL & INSTALLENGINE CONTROLS - REMOVE/INSTALL/OVERHAULFUEL SYSTEM (DIESEL)PURGING FUEL SYSTEM
1993 GMC Jimmy Base, 2D Utility, 4.3 Z, RWD, Standard
Purging Fuel System
1993 GMC Jimmy Base, 2D Utility, 4.3 Z, RWD, StandardSECTION Purging Fuel System
- Park vehicle on a level surface. Place drain pan under drain hose to collect fuel. Open drain valve 3-4 turns. With fuel tank cap installed, use air nozzle and apply 3-5 psi (.21-.35 kg/cm2 ) through fuel return hose at injection pump.
- Contaminated fuel will be forced out of tank via filter drain hose. Continue to drain fuel until clear fuel is observed. Entire fuel tank may have to be drained. Close drain valve. Install fuel return hose.
NOTE:
If vehicle is equipped with dual tanks, perform purging procedure on each tank.
RENDER: 1.0x
NO RELATED
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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.