This procedure addresses a non-existent component on a 1966 Corvette 327ci V8, as carbureted engines from this era do not have boost pressure sensors.

Warnings

Preparation

1. Verify that your vehicle has actually been modified with an aftermarket forced induction system and electronic engine management, as the factory 1966 Corvette 327 V8 uses a carburetor with no electronic sensors

Procedure

1. 1

   Identify aftermarket system configuration
   Locate the aftermarket engine management ECU and wiring harness. Trace the boost pressure sensor wiring from the ECU to determine sensor location. Common mounting locations on aftermarket turbo/supercharger installations include the intake manifold plenum, intercooler piping, or a vacuum block near the carburetor.
2. 2

   Disconnect battery negative terminal
   Disconnect the negative battery cable to prevent electrical shorts while working with aftermarket engine management wiring.
3. 3

   Disconnect sensor electrical connector
   Unplug the electrical connector from the boost pressure sensor. Note the connector orientation and pin arrangement for reinstallation.
4. 4

   Disconnect vacuum/pressure line
   Carefully disconnect the pressure reference line from the sensor. If the line is secured with a clamp, loosen or remove the clamp first. Inspect the line for cracks or damage.
5. 5

   Remove boost pressure sensor
   Remove the sensor from its mounting location. Most aftermarket sensors are either threaded into a bung (typically 1/8 NPT) or secured with a mounting bracket. If threaded, unscrew counterclockwise by hand or with a wrench on the hex portion of the sensor body.
6. 6

   Install new sensor
   Install the replacement boost pressure sensor in the same orientation and location as the original. If threaded, apply a small amount of thread sealant appropriate for pressure sensors (avoid Teflon tape that can contaminate the sensor). Hand-tighten, then snug with a wrench—do not overtighten as this can damage the sensor body or crack the manifold bung.
7. 7

   Reconnect pressure line and electrical connector
   Reconnect the pressure reference line to the sensor, securing with the original clamp if applicable. Plug in the electrical connector, ensuring it clicks or locks into place.
8. 8

   Reconnect battery
   Reconnect the negative battery cable.

Reassembly

1. Ensure all vacuum/pressure lines are properly secured and free of leaks
2. Verify electrical connector is fully seated and locked

Verification

• Start the engine and allow it to idle; check for vacuum or boost leaks around the sensor and pressure line connections
• Use the aftermarket ECU's diagnostic software or display to verify the boost pressure sensor is reading correctly (should show atmospheric pressure or slight vacuum at idle)
• If equipped with a boost gauge, verify gauge readings match expected values during idle and boost conditions
• Road test the vehicle and monitor boost pressure readings to ensure sensor is functioning correctly under load

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