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 MANUALSJEEP1987CHEROKEE LIMITEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM4.0L MPI SYSTEMDIAGNOSIS & TESTINGFUEL SYSTEM TESTFUEL FLOW
1987 Jeep Cherokee Limited
Fuel Flow
1987 Jeep Cherokee LimitedSECTION Fuel Flow
- Remove cap from the pressure test port on the fuel rail. See Fig 1 . Connect piece of hose to port and place other end in graduated container of at least one quart (1L) capacity.
- Pinch off fuel return line. Run fuel pump by placing jumper wire between terminals "D1-5" and "D1-6" of diagnostic connector "D1". If fuel flow is less than one quart (1L) in one minute, replace fuel pump. Remove hose and install test port plug.
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.