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.
1989 Chrysler Conquest AutomaticFACTORY OEM SERVICE PROCEDURE
Boost Pressure Control System
- Remove Yellow-striped vacuum hose from wastegate actuator. Connect vacuum pump to disconnected Yellow-striped hose and leave connected throughout testing procedure.
- Disconnect Black vacuum hose from air intake pipe located between intercooler and injection mixer. Plug air intake pipe nipple and start engine. With engine idling and Black hose end open, apply vacuum to Yellow-striped hose to ensure vacuum bleeds down.
- With engine idling, plug Black vacuum hose and apply vacuum to Yellow-striped hose to ensure vacuum holds. With engine speed at 4000 RPM and Black vacuum hose plugged, apply vacuum to Yellow-striped hose to ensure vacuum bleeds down.
- If vacuum does not hold when specified, check vacuum hoses and wastegate solenoid valve for damage.
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.