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Diagnostic Aids

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Checking engine oil helps determine if there is enough engine oil to operate fuel injectors. If there is little or no oil in crankcase, injectors will not operate.

  1. Ensure vehicle is on level ground. Check engine oil. If oil is overfilled, engine may have been incorrectly serviced, or fuel is diluting oil and filling crankcase. Repair as necessary.
  2. Inspect oil color. A milky White color indicates possible coolant contamination. Determine cause and repair as necessary. If oil level is low, top off oil. Ensure oil is correct type and viscosity.
  3. Remove plug in top of oil reservoir and check oil level. If oil level is within 1" (25.4 mm) of oil fill hole, level is okay. If oil level is not within 1" (25.4 mm) of oil fill hole, check and repair cause of low fluid. Top off fluid.
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