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.
General Operation
1988 Eagle Eagle Wagon L6-258 4.2LSECTION General Operation
This unit is a microprocessor that monitors the oxygen sensor voltage and, based upon the mode of operation, generates an output control signal for the carburetor mixture control (MC) solenoid on 4-150 engines or stepper motor on 6-258 engines.
If the system is in the closed loop mode of operation, the air/fuel mixture will be varied according to the oxygen content in the exhaust gas and current engine operations.
If the system is in the open loop mode of operation, the air/fuel ratio will be based on a predetermined value that is determined upon several engine operating parameters.
RENDER: 1.0x
NO RELATED
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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.