The oil pressure gauge on my '97 Explorer starting fluctuating between a low reading and the middle of the gauge approx. 6 months ago. I was told that the oil pump was bad and that if I replaced the pump I should just replace the engine (140k miles). Another shop said that I should put in heavier oil to see what happens. I starting using 20W-50 and the reading stayed normal until my most recent oil change. Now sometimes the guage is erratic and sometimes it is fine. Could there be another cause that doesn't require the oil pump change, like a faulty oil pressure swtich for example?
Tuesday, January 10th, 2006 AT 12:45 AM