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 MANUALSCHEVROLET1993SPORTVAN G30, VAN PASSENGER, 7.4 NREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL)FUEL SYSTEM (GASOLINE)THROTTLE BODY (TBI)REMOVAL
1993 Chevrolet Sportvan G30, Van Passenger, 7.4 N
Throttle Body (TBI): Removal
1993 Chevrolet Sportvan G30, Van Passenger, 7.4 NSECTION Removal
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect air cleaner (THERMAC) hose from engine vacuum fitting (if equipped). Remove air cleaner, adapter and gasket. Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELIEF (TBI) under FUEL SYSTEM (GASOLINE).
- Disconnect electrical leads at IAC motor, throttle position sensor, and fuel injector(s). Disconnect fuel lines from throttle body. Discard fuel line "O" rings. Disconnect grommet with wires from throttle body.
- Disconnect throttle linkage, return spring and cruise control linkage (if equipped). Label and disconnect all vacuum hoses from throttle body. Remove throttle body mount bolts/nut. Remove throttle body.
NOTE:
Disassembling throttle body unit for immersion in cleaning solvent requires removal of throttle body cover or fuel meter assembly, TP sensor, IAC assembly and governor assembly (if equipped). Throttle valve screws are staked in position and should NOT be removed.
RENDER: 1.0x
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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.