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Old 02-04-2014, 12:53 PM   #1
TyranosaurusWRX
Scooby Specialist
 
Member#: 25731
Join Date: Oct 2002
Chapter/Region: MWSOC
Location: Ft Wayne, IN
Vehicle:
02 wrx(sold)/2005
Sti/ 93 Leg Wag

Default Low oil pressure

Been trying to troubleshoot a low oil pressure situation. I have a simple Autometer gauge with an electronic sender. The sender is connected to a braided line going to the block. Normally when all is working the gauge reads between 75-80psi when the block is cold and once it warms up it idles between 15-20 psi and revs up to 70 psi while driving. When I first start the car up cold I'm getting almost 75psi but once it warms up fully I get about 12psi on idle and am lucky to hit 45psi when revving it up driving. It's a recent motor build so I really haven't ran this hard at all. It only has a little over 700 break in miles boosting to about 5lb on the average keeping the revs under 4k so I really didn't notice the problem right away.

I've replaced the sender and the oil pump, and even changed the oil just in case there was an issue with viscosity. The old oil really wasn't in bad shape, not a lot of metal or flakes outside of normal break in. I would think that if the oil pickup was cracked it would not be getting any pressure, or relatively none. Not sure really what else could cause it....maybe one of the two grommets/seals in the oil pan?
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