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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONTESTING AND INSPECTIONCOMPONENT TESTING
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
Component Testing
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION Component Testing
SUB EGR CONTROL VALVE
1. Ensure valve moves freely when pulled by hand. If valve is difficult to move, remove and check for carbon, dust or other deposits. Clean valve with suitable solvent and lightly lubricate as necessary.
2. If valve is still difficult to move, it should be replaced. If valve is difficult to remove, remove rubber boot and spray valve with suitable solvent to loosen.
EGR CONTROL SOLENOID VALVE
1. Start engine and run at idle until normal operating temperature is reached.
2. Disconnect green striped hose from injection mixer and connect hand vacuum pump to hose end.
3. Disconnect electrical connector from solenoid valve and apply approximately 9.8 inches Hg vacuum to valve. Engine should stall or idle become unstable.
4. Reconnect solenoid valve electrical connector and apply 9.8 inches Hg vacuum to valve. Engine operation should not be affected.
5. Replace valve if operation is not as described.
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.