LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Weird gauge problem

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Old 05-06-2009, 06:01 PM
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Default Weird gauge problem

So i have a really weird gauge problem going on here. As the car warms up the oil pressure drops, from 40 psi at 2k when its cold to not even leaving the red zone (7-8psi maybe) at 2k when the car is at 190 degrees. At first i thought my oil pump was shot, but why would it operate fine when its cold?
Old 05-06-2009, 06:03 PM
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Originally Posted by Trick450r
So i have a really weird gauge problem going on here. As the car warms up the oil pressure drops, from 40 psi at 2k when its cold to not even leaving the red zone (7-8psi maybe) at 2k when the car is at 190 degrees. At first i thought my oil pump was shot, but why would it operate fine when its cold?
You need to hook up a mechanical gauge to see where your pressure is really at.
Old 05-06-2009, 06:06 PM
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Might be the o ring on the oil pick up tube in the motor have heard lots of instenses of this. Have you done anything to the motor lately?
Old 05-06-2009, 10:10 PM
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Originally Posted by ss.slp.ls1
You need to hook up a mechanical gauge to see where your pressure is really at.
Definetly go with a mechanical gauge, way more accurate. If you dont want to do that, replace your oil pressure sensor (pretty sure thats the problem), but have fun with that hehe!!! The electrical one in mines always reads about 5-10 psi off from my mechanical gauge......
Old 05-06-2009, 10:21 PM
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bought a new sending unit, if that changes it even alittle bit ill buy a mech gauge...just wanna make sure its not the pump itself first.




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