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 MANUALSFORD1987AEROSTAR VAN PASSENGER, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEGR FUNCTION TESTINGEGR VALVEINTEGRAL BACKPRESSURE TRANSDUCER VALVE
1987 Ford Aerostar Van Passenger, Standard
Integral BACKPRESSURE Transducer Valve
1987 Ford Aerostar Van Passenger, StandardSECTION Integral BACKPRESSURE Transducer Valve
- Check vacuum hose routing. Disconnect EGR valve hose and connect vacuum gauge to hose. With engine warm, vacuum should be available to valve at 3000 RPM on 2.3L engines, or at kickdown RPM on all other engines. If vacuum is not available, check vacuum lines from EGR valve to source.
- Clamp a plug (freeze plug may be used) into end of tailpipe, about 1/16" less than I.D. Connect vacuum pump to EGR valve. Idle engine and gradually apply vacuum. EGR valve stem/diaphragm should move smoothly and engine should drop at least 100 RPM.
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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.