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Evo 4 Oil Pressure Problems at idle

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Old Jan 31, 2014 | 12:19 PM
  #1  
Capes's Avatar
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From: Taupo
Evo 4 Oil Pressure Problems at idle

Just recently the oil pressure warning light would come on at idle once the car was at normal running temp but would go off again if revved or driven. I had an electronic oil pressure gauge installed & once the car was warm it was reading 0psi at idle.
After a bit of research online I was pretty convinced that the least of my worries was I needed a new oil pump. But before I went any further I dropped the sump off & pulled the oil intake out, which looked to be partially blocked. So I gave it & the sump a good clean, put it all back together, filled it up with fresh Castrol Magnatec 10-40 put on a new oil filter & it seems to have solved the problem. The oil pressure gauge now reads around 10psi at idle which I hope is a crap load better.
I was wondering now if anyone out there knows what the normal oil pressure readings are, as I can't find any info about this.
The car is un-modified apart from an HKS Pod filter, BOV & a full 2.5" Ralliart Exhaust system.
Any help would be much appreciated.
EVOLVE
Old Feb 1, 2014 | 07:11 AM
  #2  
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You should see about 14-28 psi at idle. Expect to see highest pressures after a cold start then it evens out (around 23-25 for me). That said my oil is a lil thicker than yours.
Old Feb 1, 2014 | 12:35 PM
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From: Grand Island, NE
Well, for 22 year that I know of the oil switches on the 4G63 have been set to come on at 4 psi.
Old Feb 9, 2014 | 02:27 PM
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send me your adress email i send you service manual for evo 4 if you want
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