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 MANUALSGMC1986S15 JIMMY 2.8 R, RWD, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - TBITESTINGFUEL SYSTEM PRESSURE RELIEF
1986 GMC S15 Jimmy 2.8 R, RWD, Automatic
Fuel System Pressure Relief
1986 GMC S15 Jimmy 2.8 R, RWD, AutomaticSECTION Fuel System Pressure Relief
- On 2.8L and 4.3L engine, fuel pressure is relieved and drops to zero when ignition is turned off. On 2.5L engine, remove "FUEL PUMP" fuse from fuse block.
- Crank engine. Engine will start and run until fuel supply remaining in fuel lines is used. Engage starter for about 3 seconds to remove any remaining fuel. With ignition off, replace fuse.
WARNING:
To minimize the risk of fire and personal injury when relieving pressure in fuel system, cover area to be disconnected with a shop rag. After use, place rag in approved container.
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.