Oil Pressure???
Thread Starter
Staging Lane
Joined: Sep 2005
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Oil Pressure??? Ok, so i got a 93 lt1 with a 152K on the odo. Still pulls very hard and nothing wrong with it at all. About the middle of last week i started noticing that my oil pressure was really whack. Before I would usually chill in stop/go traffic at 40psi. and cruising pressure of 50. Now after last week in stop/go traffic it sometimes might get extremely close to 20 psi. and i would bevery lucky to hit 50 while cruising. but mostly chills at the 40 range cruising. Also when i mash it, pressure drops crazy low like damn close to 20 
. but before it would climb when i did that. I'm thinking, oil pump, oil pressure sender, oil pressure switch, or the oil level sensor on the pan. Or the gauge itself is bad all a sudden. Any suggestions on this beast?
. but before it would climb when i did that. I'm thinking, oil pump, oil pressure sender, oil pressure switch, or the oil level sensor on the pan. Or the gauge itself is bad all a sudden. Any suggestions on this beast? 
im actually experiencing the same problem. after it sits for a night it will be about 60-70 psi, then after driving it will go to about 50 and in traffic hit 25 psi...curious if its the gauge
I bet its the OPSU (oil pressure sending unit) mine did that for a while then i got that replaced. I broke mine too, and had to drive it for a week and the gauge was all the way maxxed out.
Yea its a bitch to get to if you have LTs. The cable coming off the unit is a freaking foot long. I hear you can relocate the unit to the back of the intake manifold somewere, or that might be the EGR? Dunno 
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Thread Starter
Staging Lane
Joined: Sep 2005
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ok, so if i'm to buy a mechanical gauge is there anything in particular that i would need to hook it up. or is there already provisions for it some where that i dont know about. also couldn't i have a scanner that was meant for my odb-I system, hook it up and read all the different pressure's of the system (oil, fuel, coolant temp, etc)??
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Well, pressure is normal if its close to 20 psi at a stop with engine at normal operating temperature, but it should climb with acceleration. Be worried when it won't climb up..... Mine reads very high when engine cold(75-80psi), cruising at 45-55mph sits a 40-55psi. When stopped at a light sits about 20-22psi.
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From: ringgold,ga
i had a t/a with low oil psi. it read about 10-15 at idle and reved 25-30. changed the oil psi sensor above the oil filter and fixed the problem. what type oil you running? changing to a thicker oil can give you more oil psi.
Thread Starter
Staging Lane
Joined: Sep 2005
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Originally Posted by lt1taracing
i had a t/a with low oil psi. it read about 10-15 at idle and reved 25-30. changed the oil psi sensor above the oil filter and fixed the problem. what type oil you running? changing to a thicker oil can give you more oil psi.
Last edited by drdarkman; Feb 5, 2006 at 01:09 PM.