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.
Reassembly & Installation
1991 Geo Tracker LSi, AutomaticSECTION Reassembly & Installation
- Assemble upper and lower throttle bodies with new gasket. Install and tighten 2 upper-to-lower throttle body attaching screws to 31 INCH lbs. (3.5 N.m). Install fuel pressure regulator with new "O" ring and tighten mounting screws to 31 INCH lbs. (3.5 N.m).
- Install ISC solenoid valve with new gasket and tighten mounting screws to 31 INCH lbs. (3.5 N.m). Apply thin coat of gasoline to new injector "O" rings. Install "O" rings on injector. Insert injector into throttle body. Carefully install wiring harness to injector.
- Install injector cover. Tighten screws to 31 INCH lbs. (3.5 N.m). Install TPS. Clamp wiring harness securely to side of throttle body. Adjust TPS sensor. See THROTTLE POSITION SENSOR (TPS) in ADJUSTMENTS article in the ENGINE PERFORMANCE Section. Install new throttle body base gasket on intake manifold. DO NOT use sealer or glue.
- Install throttle body and tighten to specification. See TORQUE SPECIFICATIONS table at end of article. To complete installation, reverse removal procedure. Refill cooling system. Pressurize fuel system and check for leaks.
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.