92 4.9L High oil pressure, high temp, low voltage
09-22-2015, 08:53 PM
#1
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92 4.9L High oil pressure, high temp, low voltage
Hello, when I drive my 1992 f150 4.9l the oil pressure goes all the way up to the H, the battery voltage drops and the battery light flickers on and off, and my temperature goes up. When I stop the truck the oil pressure goes down into the normal range, the temperature goes into the normal range, and the battery light stops flickering. I changed the oil and the filter, I changed the auto tensioner today and still no change. I'm not sure if it could be the oil pump since the oil pressure is high and not low. If anyone has any ideas please let me know.
Last edited by tye41; 09-22-2015 at 08:57 PM.
09-22-2015, 10:24 PM
#2
Martin
Sounds more like a bad ground than anything mechanical with oil or coolant system. Could also be corrosion in positive or ground cables. That's what I'd look at first.
09-23-2015, 08:49 PM
#3
Senior Member
Suggest when it does this, to rap sharply downward on the dash above the instrument panel. Should the needles move, consider pulling the instrument panel and reseating or cleaning the panel connectors.