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 MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONSUB-SYSTEM DESCRIPTIONHIGH ALTITUDE COMPENSATION SYSTEM
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
High Altitude Compensation System
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION High Altitude Compensation System
A pressure sensor and solenoid valve are used on some models as a high altitude compensator. When the ignition is first turned on, and thereafter at a specified interval, the solenoid valve is energized by the ECU for a preset time. This allows the pressure sensor to detect ambient barometric pressure which the ECU uses to maintain the same air/fuel ratio at high altitude and sea level.
RENDER: 1.0x
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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.