oil pressure

BrentSC

Registered User
my 90sc has been put away for winter. well the other day it was really nice and i decided to fire it up and let it run for awhile. i looked at the oil pressure gauge and the needle was bouncing all over the place. the pressure never went extremely high or all the way to low, but it was moving around alot when it should have been staying in one spot lol. what do you guys think the problem might be??? thanks!!!


brent
 
Bad oil pressure sender which is only a switch in reality. It closes at about 7 psi and opens at around 5 psi. When the switch contacts start to go you get varing oil pressure indications since normally the amount of current in the circuit is "set" and the oil pressure you "see" does not vary.
 
May also be a sticking oil pump bypass valve. It wouldnt hurt to warm it up thoroughly and change the oil if it has been sitting.That may help.
 
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