Admission d'air froid pour Acura Legend (1991-1995) 3.2L V6 Base L LS

The Wrench Time for Your 1991-1995 Acura Legend 3.2L

• Estimated Time: 60-90 Minutes
• Difficulty: 4/10 - The top-end intake swap is a breeze, but the C32A engine hides a massive factory resonator box down inside the passenger fender well. Extracting it requires some patience with 30-year-old plastics.

Tools You Will Need

• 10mm & 12mm sockets with a 6-inch extension and a 3/8-inch drive ratchet
• 8mm nut driver (for aftermarket T-bolt or worm gear clamps)
• Phillips head screwdriver (for factory hose clamps)
• Panel popper tool (critical for the brittle splash guard clips)
• Needle-nose pliers (for factory vacuum hose spring clamps)

Phase 1: Removing the Factory Part

1. Disconnect the Battery: Always start by disconnecting the negative battery terminal using a 10mm wrench to prevent check engine lights and allow the ECU to reset its fuel trims.
2. Disconnect the Sensors and Hoses: Locate the Intake Air Temperature (IAT) sensor plugged into the factory intake piping and carefully unclip the harness. Using your needle-nose pliers, pinch the spring clamps holding the valve cover breather hose and the PAIRC vacuum line, then slide them back. Gently pull the hoses off the intake tube.
3. Remove the Upper Airbox and Tube: Grab your Phillips head screwdriver or 10mm socket to loosen the band clamp at the throttle body. Unbolt the top half of the airbox using a 10mm socket and pull the entire upper intake tube and filter housing out of the engine bay.
4. Access the Lower Resonator (The Boss Fight): Turn your steering wheel all the way to the right (or safely jack up the front right corner and remove the passenger wheel). Using your panel popper tool, carefully pry out the plastic retaining clips holding the inner fender liner back. Fold the liner out of the way.
5. Extract the Factory Resonator: Look up into the fender well to locate the massive plastic resonator box. Use your 10mm socket on a 6-inch extension to remove the mounting bolts securing it to the chassis. Wiggle the entire assembly down and out of the vehicle.

Phase 2: Installing the Cold Air Intake for Acura Legend (1991-1995) 3.2L

1. Install the Throttle Body Coupler: Slide the provided silicone reducer coupler onto the throttle body. Secure the throttle body side using an 8mm nut driver to tighten down the hose clamp. Leave the outer clamp loose for now.
2. Route the Cold Air Pipe: Take your new Cold Air Intake pipe and carefully snake it down through the hole in the engine bay where the factory airbox used to sit, routing the lower end into the passenger fender well. Slide the upper end into the silicone coupler at the throttle body.
3. Transfer Sensors and Reconnect Hoses: If your new intake pipe features a grommet for the IAT sensor, carefully push the factory sensor into the hole (a dab of clean engine oil helps it slide in). Push the factory PAIRC line and valve cover breather hose onto the welded nipples on the new pipe. Secure them with the OEM spring clamps using your pliers.
4. Mount the Cone Filter: Reach back into the passenger fender well. Slide the high-flow cone filter onto the bottom of the intake pipe. Position it so it is not rubbing against any metal chassis edges, then clamp it down tight with your 8mm nut driver. Reinstall your fender liner using the plastic clips.
5. Secure and Align: Double-check all clearances. Tighten the remaining hose clamp at the throttle body. Bolt the intake pipe’s welded bracket to the factory mounting point using a 10mm socket to prevent vibration.
6. The ECU Relearn Procedure: Reconnect your negative battery terminal. Start the engine, but DO NOT touch the gas pedal for at least 20 seconds. Let the vehicle idle so the ECU can calibrate to the newly increased airflow. Check for any whistling or vacuum leaks around your couplers.

Disclaimer: This is a general guide provided for the 1991-1995 Acura Legend 3.2L. Always refer to your factory service manual for exact torque specifications and safety procedures.