Asuna SE 1993 MAP Sensor: A Guide to Replacement and Troubleshooting
If your 1993 Asuna SE is running rough, stalling, or getting poor gas mileage, the MAP sensor could be the culprit.
- A faulty MAP sensor directly impacts fuel economy, engine smoothness, and power.
- Replacement is very easy and can be done in under 30 minutes with basic tools, making it a great DIY fix.
- Aftermarket sensors are a cost-effective and reliable solution for this vehicle, as OEM parts are rare.
- Always check the sensor's vacuum hose for cracks or blockages before buying a new part.
Is Your Asuna SE MAP Sensor Failing?
A bad MAP sensor feeds incorrect information to your Asuna's engine computer, leading to a variety of noticeable engine problems. Because the Asuna SE is a rebadged Isuzu Impulse, symptoms and parts are often shared with its Isuzu and Geo Storm cousins. The most common sign of trouble is the check engine light, but you may experience other issues first.
Key Symptoms of a Bad MAP Sensor:
- Poor Fuel Economy: One of the most common signs is a sudden drop in gas mileage. The computer may think the engine is under heavy load and inject too much fuel.
- Rough Idle: The engine may shake or idle unevenly because the air-fuel mixture is incorrect.
- Lack of Power: Your car may feel sluggish and hesitate when you accelerate.
- Stalling: The engine might stall, especially when you step on the gas or when it should be idling.
- Failed Emissions Test: An incorrect air-fuel ratio can cause high levels of harmful emissions like hydrocarbons (HC) and carbon monoxide (CO).
- Difficulty Starting: The engine may be hard to start or won't start at all unless you press the gas pedal.
Check for Vacuum Leaks First
Before replacing the sensor, inspect the vacuum hose that connects it to the intake manifold. A cracked, loose, or clogged hose can cause the same symptoms as a bad sensor and is a much cheaper fix.
Choosing the Right Aftermarket MAP Sensor
Finding original Asuna-branded parts is nearly impossible today. Even genuine GM or Isuzu parts can be scarce. For a 1993 Asuna SE, a new aftermarket MAP sensor is the most practical and cost-effective choice. The "Replacement" brand offers a direct-fit part designed to meet original equipment specifications. For a simple electronic sensor on an older vehicle, a standard aftermarket part provides reliable performance without the high cost or difficulty of sourcing a new old stock (NOS) OEM part.
Cost of Replacing a 1993 Asuna SE MAP Sensor
| Part Type | Estimated Cost |
|---|---|
| New OEM (GM/Isuzu) | $75 - $120+ (If available) |
| New Aftermarket | $26.12 |
| Used OEM | $15 - $40 |
| Shop Labor | $50 - $100 |
DIY Replacement is Quick and Easy
Replacing the MAP sensor is a great job for a beginner. It's typically located right on the intake manifold, held by one or two bolts. The entire job usually takes less than 30 minutes with basic hand tools.
Frequently Asked Questions
Where is the MAP sensor located on a 1993 Asuna SE?
The MAP sensor is a small, black plastic part usually mounted directly on the engine's intake manifold or very close to it. It will have a small vacuum hose and an electrical connector attached.
What are the trouble codes for a bad MAP sensor?
Your 1993 Asuna uses an OBD-I system. While codes vary, they point to circuit malfunctions (high or low voltage) or performance range issues. Common OBD-II equivalents are P0105, P0106, P0107, and P0108, which describe these same faults.
Do I need to reset the computer after replacing the MAP sensor?
It's a good practice to disconnect the battery's negative terminal before starting the repair. This will protect the electrical system and reset the engine computer. After the new sensor is installed and the battery is reconnected, the check engine light should stay off if the sensor was the only problem.
Are there any recalls for the Asuna SE MAP sensor?
No recalls or common Technical Service Bulletins (TSBs) were found for the MAP sensor on the 1993 Asuna SE or its Isuzu and Geo counterparts.
Technical Specifications
OEM Part Numbers: 16017460 8160174600 16137039
3-pin connector
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Asuna SE: