Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1990COUGAR/XR7 V6-232 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONSYSTEMADAPTIVE STRATEGY
1990 Mercury Cougar/XR7 V6-232 3.8L
Adaptive Strategy
1990 Mercury Cougar/XR7 V6-232 3.8LSECTION Adaptive Strategy
Adaptive strategy has been added the the EEC-IV system. This feature continually adjusts the calibration strategy to correct for wear and aging calibration components. The adaptive strategy then retains the adjustments in the keep alive memory (KAM) so they will not be lost (cancelled) when the ignition switch is turned OFF. A short adjustment period will occur on new vehicles, when the battery or the electronic control assembly (ECA) is disconnected or replaced and when a component of the EEC-IV system is replaced.
If an EEC component is replaced (due to age or damage), the memory may need to be cleared to eliminate the adjustments that were made to correct the replaced component. It is possible for the engine operation to actually deteriorate because the new component will be controlled as if it were still the replaced aged or damaged component.
During the adjustment or learning period (usually under 5 miles of driving) some vehicles could exhibit abnormal drive symptoms (surge, hesitation and high idle speeds).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.