1986 Mercury Capri Intake Manifold Temperature Sensor Replacement Guide
If your Capri is running rough or getting poor gas mileage, a faulty air temperature sensor could be the culprit.
- A bad IAT sensor commonly causes a Check Engine Light, poor gas mileage, and rough idling on your 1986 Capri.
- This is a very easy and inexpensive DIY repair, typically taking less than 30 minutes.
- Look for OBD-I codes like 24, 64, 113, or 114 to help confirm the sensor has failed.
- Choosing a quality aftermarket brand like Standard Ignition is recommended for long-term reliability.
Is Your 1986 Capri Showing Signs of a Bad Air Temp Sensor?
The Intake Air Temperature (IAT) sensor on your 1986 Mercury Capri is a simple but important part of the fuel injection system. Because the 1986 Capri is part of the Fox Body family, it shares many components with the Ford Mustang of the same era, including this sensor. When it fails, it can cause a range of noticeable engine problems. Since your vehicle uses an OBD-I system, a lit 'Check Engine' light will require a special tool or procedure to read the codes.
Symptoms of Failure
A bad IAT sensor sends wrong information to the engine computer, leading to poor performance. Here are the most common signs:
- Check Engine Light: The computer will log a fault code when it detects a problem with the sensor's signal. For a 1986 model, this could be a 2-digit code like 24 (out of range) or 64 (circuit grounded), or a 3-digit code like 113 or 114.
- Poor Fuel Economy: If the sensor incorrectly reads cold air, the computer will enrich the fuel mixture, causing you to use more gas.
- Rough Idle and Hesitation: An incorrect air-fuel mix can make the engine idle poorly, hesitate during acceleration, or feel sluggish.
- Hard Starting: The engine may be difficult to start, especially in cold weather, because the computer can't set the right fuel mixture for a cold engine.
No Recalls or Common Issues
Our research found no specific recalls or Technical Service Bulletins (TSBs) from Mercury or the NHTSA for the intake air temperature sensor on the 1986 Capri. Failures are typically due to age and normal wear.
Choosing the Right Aftermarket Sensor
For a vehicle like the 1986 Capri, OEM parts are often discontinued. Aftermarket sensors are readily available and are a practical choice. The two brands available are Standard Ignition and True Tech.
- Standard Ignition (Standard Motor Products): Generally considered a top-tier aftermarket brand. Their parts are known for good quality and durability, often meeting or exceeding original specifications. This is a solid choice for reliability.
- True Tech: This brand falls into the standard or economy category. It offers a cost-effective solution that will get the job done, but may not have the same long-term durability as a premium brand like Standard.
Pro Tip: For a critical sensor like the IAT, spending a few extra dollars on the Standard Ignition brand is a good investment in reliability and performance.
Expected Replacement Costs
Replacing the IAT sensor is one of the easier and more affordable repairs you can perform on your Capri.
| Part Type | Price Range |
|---|---|
| New Aftermarket | $15.14 - $21.98 |
| Shop Labor | $50 - $75 |
| Total Cost | $65 - $97 |
Cost estimates are for the part and labor only and do not include taxes or diagnostic fees. OEM parts are likely discontinued.
Frequently Asked Questions (FAQ)
Where is the IAT sensor located on a 1986 Mercury Capri?
The IAT sensor is typically screwed directly into the lower intake manifold. It is a small, two-wire sensor that is easy to see and access once you have located it.
Can I replace this sensor myself?
Yes, this is a great DIY job for beginners. It usually involves unplugging the electrical connector, unscrewing the old sensor with a wrench, and then screwing in the new one. The entire process should take less than 30 minutes.
Is the IAT sensor the same as the coolant temperature sensor?
No, they are different sensors, although on some Ford vehicles of this era they look very similar and may even share a part number. The IAT measures air temperature in the intake, while the Engine Coolant Temperature (ECT) sensor measures the temperature of the engine coolant. They serve different functions for the engine computer.
Do I need to disconnect the battery to replace the IAT sensor?
It is always a good safety practice to disconnect the negative battery terminal before working on any electrical components of your vehicle. This prevents accidental shorts.
Technical Specifications
OEM Part Numbers: E0AE12A697AA
Connector Shape: Round, Terminal Quantity: 2, Attachment Method: Screw-in
We Have This Part in Stock
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.
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