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I was driving down the road last night, noticed my oil pressure steadily
falling, according to the gauge. Idiot light never came on, even though
the gauge dropped all the way to the stop. Checked oil, had oil. Thought
"ok.. thats weird" started it, listened to it run, to see if it indeed did
have low oil pressure. Seemed to run fine.. drove it very slowly back
Several times, the gauge went from +/- 60psi to none... oil light never
once came on.
It was time for an oil change anyway (well past, actually.. old oil was
starting to "bubble"), and I was thinking perhaps either some of those
"bubbles" had gotten into the sending unit for the gauge, and/or excess
trash. Well.. after the oil change, started the vehicle, oil pressure went
upto around +/- 40psi and fell back off as soon as the engine returned to
"idle" from the startup. Revving the engine didnt even budge the gauge.
Now.. my best guess is that it is indeed getting pressure, but that A) the
sending unit for the gauge is bad (assumes light and gauge have two
different ways of measuring the oil pressure) or B) the actual gauge itself
is bad (which is not unheard of, but unlikely)
I really have no idea where to start here, as I don't know where the
oilpress sending unit for the gauge even is.
1995.5 Isuzu Rodeo LS, 3.2L V6, 4x2, auto, all power
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