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 - DIESELTESTINGFUEL SYSTEM TESTINGINJECTION PUMP INLET RESTRICTION
1985 Mercury Lynx Base, 2D Hatchback, 1.9 9, MTXII
Injection Pump Inlet Restriction
1985 Mercury Lynx Base, 2D Hatchback, 1.9 9, MTXIISECTION Injection Pump Inlet Restriction
- Connect pressure test kit. See Figure . Disconnect fuel inlet at injection pump. Install adapter tee (10575) in fuel line. Connect fuel line to tee. Connect tee to vacuum gauge.
- Run engine at 4000 RPM under no load. Vacuum should be less than 3 in. Hg. If not, check fuel lines for restrictions.
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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.