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.
1984 Plymouth Conquest AutomaticFACTORY OEM SERVICE PROCEDURE
System Test
- Start the engine and let run at idle until it reaches operating temperature. Remove Green stripe hose from injector mixer and connect the vacuum pump to hose end.
- Disconnect the connector of solenoid valve and apply a vacuum of 9.8 in. Hg. If unstable idling occurs or the engine stalls at the moment, EGR system is good.
- Reconnect connector of solenoid valve and apply a vacuum of 9.8 in. Hg to Green stripe hose from injector mixer. Engine should remain unaffected. If unstable idling occurs, solenoid valve must be replaced.
Factory Service Tools
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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.