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 MANUALSFORD1987ECONOLINE E150, VAN CARGO EXTENDED, 5.8 HREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSDIAGNOSIS & OVERHAUL - C6TESTINGCONTROL PRESSURE TEST RESULTSHIGH AT IDLE IN ALL RANGES
1987 Ford Econoline E150, Van Cargo Extended, 5.8 H
High At Idle In All Ranges
1987 Ford Econoline E150, Van Cargo Extended, 5.8 HSECTION High At Idle In All Ranges
Check vacuum diaphragm unit, manifold vacuum line, throttle rod, and control rod. Check for sticking regulator boost valve(s).
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.