when you first start the engine up cold, the oil pressure is fine. once the engine reaches temperature, it drops to about 15-20. but once you get above 2k rpm, the pressure is fine again. does anyone else experience this? is it the oil pump giving up or is it the oil pressure sensor? i know that normally when at idle the oil pressure will be slightly lower then when at higher rpm, but should it swing that much? just to let you know the engine has 179k on it.
05-27-2007 05:33 PM
its more than likly to pressure sending unit. Make sure that its in nice and tight and the connector on the back is snug. If it persists I'd replace it(~$20). But some of my Jeeps do this occationally... usually after an oil change or a trip to the lower altitudes.