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Erratic Oil Press. Indication

knob

Member
Joined
January 13, 2007
Messages
39
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City, State
Highlands Ranch, CO
Year, Model & Trim Level
1992 XLT Sport & 97 XLT
I have a 92 Explorer Sport 4.0 w/ 172,000 miles that runs great. When driving normally down the road, the indicated oil pressure will fluctuate wildly from 0 to middle of the gage, water temp shows normal. I suspect the oilpressure sending unit is bad, but it may be the actual oil pressure is low. Any suggestions on what to check to see what is causing these indications?
 




JDraper

Somewhat Functional
Moderator Emeritus
Joined
January 11, 2001
Messages
15,304
Reaction score
16
City, State
McVeytown, PA
Year, Model & Trim Level
'18 XLT
I'd suggest pulling the sending unit out of the motor and plugging in a real pressure gauge. The factory gauge is not truly a gauge, but more of an idiot light with a needle. IIRC, it only has either 2 or 3 positions-no pressure, good pressure and high pressure (not sure on the last one).
 




unclemeat

Explorer Addict
Joined
October 20, 2002
Messages
3,079
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City, State
Richmond, VA
Year, Model & Trim Level
91 sport
Do it soon, when mine did that it was the oil pump failing.
 




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