oil pressure light

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  #1  
Old 03-15-03, 06:12 AM
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Join Date: Mar 2003
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Question oil pressure light

After driving 91 Merc Gr Marq for about 20-25 min. the oil light comes on when stopped at red light. goes off when accelerate.On when at idle in gear, off when idle at park. No tapping from engine,and oil level is full. Thinking drain holes might be clogged inside? Any suggestions ?
 
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  #2  
Old 03-15-03, 06:29 AM
darrell McCoy
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How many miles? Could be a O/P sending unit. Have it checked with a manual O/P guage.
 
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Old 03-15-03, 11:06 AM
Joe_F
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Correct. Check it with a hand-held gauge. If the pressure is OK, the sending unit for the light is bad. If not, you have internal problems.

Common problem would be a bad oil pump or clogged pickup screen.
 
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