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Pre-1997 Models

ACT and ECT sensors

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Old Mar 5, 2014 | 02:28 PM
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ACT and ECT sensors
People suggested this as part of my tune up? What are they and what do they do? Do they need to be replaced? I couldn't find them on the ROCKAUTO website. Thanks

MFW
 
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Old Mar 6, 2014 | 07:22 PM
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From: Cabot, AR
Air Charge Temperature (ACT) Sensor, Engine Coolant Temperature (ECT) Sensor. They are part of the Speed Density engine management system.
 
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Old Mar 6, 2014 | 07:31 PM
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MOTORCRAFT Part # DY720, F5AF-12A697-AA, $31.79 at Rock Auto.

MOTORCRAFT Part # DY1144, F5AF-12A648-AA, $9.16 at Rock Auto.

The two parts listed above, APPEAR to be the correct parts.
 
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Old Mar 7, 2014 | 05:01 PM
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Are these a must for a tune up? They have never been changed.

Matt
 
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Old Mar 7, 2014 | 09:18 PM
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Pull the original parts and check the condition. The ECT may have scale contamination from the coolant, and the ACT may be caked up with oil. I would be worried about the age, not the miles.
 
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