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 MANUALSDODGE AND RAM1983RAM 50 CUSTOM, 4WD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - DIESELTESTINGINJECTORSOPENING PRESSURE
1983 Dodge and Ram Ram 50 Custom, 4WD, Standard
Opening Pressure
1983 Dodge and Ram Ram 50 Custom, 4WD, StandardSECTION Opening Pressure
- Remove fuel injection pipes from injector nozzles and pump. When removing fuel return pipe nut, hold nozzle holder body with a wrench to prevent it from rotating with nut.
- Remove injection nozzle assembly from cylinder head, using Nozzle Holder Socket Wrench (MD998387).
- Mount nozzle on nozzle tester and pump tester handle to bleed nozzle. See Fig 1 . Operate nozzle tester at a rate of more than 60 strokes per minute and read gauge pressure. The reading will increase gradually with pointer oscillating while nozzle is spraying. Injection pressure is the pressure at which the pointer starts to oscillate.
- Injection pressure should be 1707-1849 psi (120-130 kg/cm2 ). Service limit for the injectors is 1565 psi (110 kg/cm2 ). If test pressure is below limit, nozzle needs to be cleaned and adjusted.
- Injector pressure can be adjusted with shims that are available in varying thicknesses. A change of 0.004" (0.1 mm) will change injector pressure 142 psi (10 kg/cm2 )
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.