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Home >> Mercury >> 1987 >> Lynx XR3 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 1.9L CFI EEC IV Testing >> Circuit Tests >> Test W >> Notes

Test W: Notes

NOTE: See HOW TO USE CIRCUIT TESTS  before performing this test. Fuel contaminated engine oil may affect service codes 41 and 42. If this is suspected, remove PCV valve from valve cover and repeat QUICK TEST  . If problem is corrected, change engine oil and filter.
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