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 WINDOW, 2.3 A, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISFUEL PUMP - ELECTRICTESTINGFUEL PUMP PRESSURE TESTMPFI MODELS (IN-TANK FUEL PUMP)
1987 Ford Aerostar Van Window, 2.3 A, Automatic
MPFI Models (In-Tank Fuel Pump)
1987 Ford Aerostar Van Window, 2.3 A, AutomaticSECTION MPFI Models (In-Tank Fuel Pump)
- Open fuel line at high pressure pump inlet. Connect hose to line from fuel tank. Route hose to a calibrated container of at least one quart capacity. Disconnect high pressure fuel pump electrical connector from body wiring harness.
- Replace fuel pump relay with modified relay. See MODIFYING FUEL CUT-OFF RELAY
. Ground wire coming from relay to a convenient ground point to energize fuel pump and measure flow for 10 seconds.NOTE: It may be necessary to momentarily block fuel hose to prime low pressure pump with outlet open and no back pressure on outlet. This is normal.
- If fuel pump produces a minimum flow of 16 oz. (473 ml) of fuel, within 10 seconds, pump is operating correctly. If there is no flow from pump, check electrical circuit and check inlet for restrictions. If electrical circuits are okay and inlet is not restricted, replace pump.
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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.