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 MANUALSFORD1987CUTAWAY 6.9 1REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - 6.9L DIESELTESTINGINJECTORS TEST
1987 Ford Cutaway 6.9 1
Injectors Test
1987 Ford Cutaway 6.9 1SECTION Injectors Test
WARNING:
When testing injector nozzles, keep spray contained to avoid serious injury. DO NOT
allow injector to release line pressure on hands, arms or any part of body, as pressure is high enough to penetrate skin.
- Always use CLEAN calibration fluid in Injector Test Stand (Rotunda 014-00300). Install injector on tester. Open test stand valve slightly and operate handle 8-10 times to bleed air from injector. Close valve.
- Open tester valve. Slowly lower tester handle and note pressure shown on gauge as injector opens. Repeat several times to obtain accurate reading.
- Opening pressure for a NEW injector should be 1800-1950 psi (126-137 kg/cm2 ). If injector opening pressure is below 1425 psi (100 kg/cm2 ) on a used injector, replace injector.
- Using test stand, maintain pressure at about 200 psi (14 kg/cm2 ) below opening pressure. No fuel leakage should occur. Slight wetting of tip after 5 seconds is okay. DO NOT wipe tip with fingers. If leakage occurs, injector(s) must be replaced.
RENDER: 1.0x
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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.