December 16, 2023

Acura Integra (1990-2001) Common Oil Leak Reasons: How To

Acura Integra engine light, oil leak, misfire, stalling Along with the oil leak, you’ve noticed your Acura Integra (1990-2001) has the engine light on, possibly a misfire, and may be stalling.  This is a common issue that many in our community encounter.  There are numerous places this can happen, let’s have a look at the most common. This problem can lead to failure to start, engine misfire, OBD trouble codes, engine vibrations, and even hesitation or stalling.  I’ll guide you through a straightforward process to troubleshoot.

Unusual vibrationsAlternatorNot starting?

Check for Recalls

The Problem

Over time, the seal on the ignition distributor shaft can wear out. This wear results in oil leaking into areas it shouldn’t be.  It may also be caused by the oil pressure sensor.

Symptoms of Oil Leak

The symptoms can vary. You might experience a failure to start, random engine misfire (OBD codes P0300, P0301, P0302, P0303, P0304), engine vibrations, hesitation, or stalling. Advanced cases might even show OBD codes P1336 and P1337.

Troubleshooting  your Acura Integra

First, check for signs of oil around the distributor shaft. Also, look for any signs of oil on the engine or under the car.  Let’s also look at the oil pressure sensor, it will be located near the oil filter or engine block.

Distributor Shaft Seal

  • Locate the distributor by following the wires leading from the engine spark plugs back to the distributor cap.
  • Remove the distributor cap and the rotor.  Note where each wire connects.
  • Remove the distributor from the engine.
  • Replace the old shaft seal with a new one.
  • Reinstall the distributor, rotor, and cap.

Oil Pressure Sensor

Another cause of symptoms like a misfire, vibrations, and stalling could be a leaking oil pressure sensor. This sensor monitors the engine’s oil pressure. If it leaks or fails, it can lead to incorrect readings and trigger the check engine light.

  • Visual Inspection: The sensor is typically located near the oil filter or the engine block.
  • Check Engine Light and OBD Codes: A faulty oil pressure sensor can trigger OBD codes related to oil pressure, such as P0520, P0521, P0522, or P0523. Use an OBD-II scanner to read any trouble codes.
  • Oil Pressure Readings: If your Integra has an oil pressure gauge, abnormal readings could indicate a sensor issue.

Replace the Oil Pressure Sensor If you’ve identified that the oil pressure sensor is leaking or faulty, here’s how to replace it:

  • Tools: a wrench set, and possibly an oil pressure sensor socket.
  • Locate the Sensor: It’s usually close to the oil filter or on the engine block.
  • Prepare: Make sure the engine is cool and the area around the sensor is clean.
  • Disconnect the Sensor: Carefully unplug the electrical connector from the sensor.
  • Remove the Sensor: Using the appropriate wrench or socket, gently unscrew and remove the old sensor.
  • Install the New Sensor: Screw in the new sensor by hand, then tighten it with the wrench. Do not over-tighten.
  • Reconnect Electrical Connector: Plug the connector back into the sensor.
  • Check for Leaks: Start the engine and check around the new sensor for any signs of oil leakage.
  • Reset OBD Codes: If you had any related codes, clear them using an OBD-II scanner.
  • Test Drive: Take your Integra for a test drive to ensure that the issue is resolved.

Additional Codes from your Acura Integra

Other OBD codes to look for include P1399, P1456, P1457, P1491, and P1456. These codes indicate other issues related to the emissions system and fuel tank.

Professional Help

If you’re not comfortable doing these repairs, seek help from a professional mechanic.

Final Thoughts

By following these steps, you can troubleshoot and fix common oil leak issues related to the ignition distributor shaft seal and oil pressure sensor, preventing the dreaded engine light and other problems.

Remember, regular maintenance is key to preventing these issues. Keep enjoying your Acura Integra, a true classic in the automotive world!