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Throttle Body: Installation

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, 2003 Buick Regal, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the gasket surface on the intake manifold and the throttle body assembly. Install a new gasket, if necessary. Install the throttle body assembly. Install the throttle body retaining nuts and bolts. Tighten the throttle body retaining nuts and bolts to specification. See TORQUE SPECIFICATIONS .
  2. Install the throttle body support bracket. Install the throttle body support bracket bolts. Tighten bolts to specification. Install the exhaust crossover. Connect the vacuum line to the throttle body. Install the accelerator controls cable bracket. Connect the TP sensor electrical connector. Connect the MAF sensor electrical connector. Reconnect the IAC valve electrical connector.
  3. Install the air cleaner intake duct. Refill the coolant. See COOLING SYSTEM BLEEDING  under COOLING SYSTEM. The throttle should operate freely without binding between full closed and wide open throttle.
  4. Inspect for complete throttle opening and closing positions by operating the accelerator pedal. Also inspect for poor carpet fit under the accelerator pedal.


CAUTION: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result. Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
  1. Install the new gasket. Install the throttle body assembly. Install the throttle body nuts. Tighten the nuts to specification. See TORQUE SPECIFICATIONS . Install the throttle body support bracket. Install the throttle body support bracket bolts. Tighten the bolts to specification.
  2. Install the air injection pipe and the nut, if applicable. Tighten the nut to specification. Install the vacuum hoses to the throttle body. Install the accelerator controls cable bracket. Connect the electrical harness retainer clip and harness to the accelerator controls bracket, if applicable.
  3. Connect the MAF sensor electrical connector. Connect the TP sensor electrical connector. Connect the IAC valve electrical connector. Install the air cleaner intake duct. Install the fuel injector sight shield. Fill the cooling system. See COOLING SYSTEM BLEEDING  under COOLING SYSTEM.


CAUTION: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result. Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
  1. Install the new gasket. Install the throttle body assembly. Install the throttle body nuts. Tighten the nuts to specification. See TORQUE SPECIFICATIONS . Install the accelerator controls cable bracket.
  2. Install the air injection pipe and the nut to the throttle body, if applicable. Tighten the nut to specification. Install the vacuum line to the throttle body. Connect the IAC valve sensor electrical connector. Connect the MAF sensor electrical connector. Connect the TP sensor electrical connector.
  3. Install the air cleaner intake duct. Fill the cooling system. See COOLING SYSTEM BLEEDING  under COOLING SYSTEM. Install the fuel injector sight shield.
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