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 MANUALSMERCURY1985LYNX BASE, 2D HATCHBACK, 1.9 9, MTXIIREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - DIESELTESTINGINJECTORSOPENING PRESSURE
1985 Mercury Lynx Base, 2D Hatchback, 1.9 9, MTXII
Opening Pressure
1985 Mercury Lynx Base, 2D Hatchback, 1.9 9, MTXIISECTION Opening Pressure
- Open gauge valve and build up line pressure by slowly depressing handle until nozzle sprays fuel. Repeat operation until accurate opening pressure is established.
- Opening pressure should be 1957-2030 psi (137.6-142.7 kg/cm2 ). If opening pressure is not within specifications, correct by replacing adjustment shim. See Fig 1 .
- Adjustment shims are available in sizes from .0197" (.50 mm) to .0606" (1.54 mm), in increments of .0016" (.04 mm). Each change in shim thickness alters opening pressure by approximately 68 psi (4.80 kg/cm2 ).
NOTE:
During testing, injector nozzle chatter will vary for each injector. Lack of chatter does not indicate a defective injector.
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.