oil preasure

[joe321]

It seems that I have an oil pressure light at low RPMs after the engine has warmed up. Its been doing this for a while; I've recently changed the oil and filter are new and I know its still there So I figure it could be either a failing pump or pressure switch. I would like to check the pressure with a gauge but I don't know the procedure to do this. My best guess is to screw the gauge into the oil pump pressure relief valve but I am not sure.

Second, if it happens to be a pressure switch were are they located and how are they changed. The haynes manual give the pressure measurements but doesn't outline the testing nor do they discuss the switches.

Thanks.

[yale329]

Unless you take a manual oil pressure test, please take my advice until you find the problem. Put a can of STP oil treatment in for safety sake. Could be a main bearing, or oil pump. Better safe tan sorry.

[Scatch!]

The pressure switch is at the "back" (toward the firewall) of the engine. Test it, and I'm fairly certain you will find your culprit.