i have a defi oil pressure guage and I can't figure out whats wrong with it. I dont get any oil pressure lights at all and everything runs normal. But my oil pressure doesnt go past about 55-58psi when at WOT up in the rpms. And at idle its either zero or bounces from 0-5psi. I have everything set up right I just cant figure it out.

BTW the car is a turbo GSR

 

have youchecked the oil pump and the pickup? Also, where are you pulling your reference for oil pressure?

 

using reference from my buddy this is his old kit on my car

 

maybe i worded that wrong, where is the pressure sender for your oil pressure gauge?

 

its coming off the back of the block to a T on the firewall for my oem sending unit from there it T's again for the guage then it goes to the turbo

 

try to get ahold of a guage that you know works, and compare them, if the readings are still of, then i would check the oil pump and pickup

 

I had the same problem. I had a -3an to a tee to my oil pressure gauge sender, stock sender, and oil feed line and had the same readings as you. I upgraded the line to the tee with a -4an and left the -3an to the turbo and the oil pressure is rock solid now, 15-20 at idle and 70-80 at full pressure by 4k rpms.

 

Definitely go buy a cheap mechanical oil pressure guage from Autozone or Oreilly's and hook it up to compare the oil pressure readings.

Khoi

 

yea, that is really something you don't want to mess with or take a chance on.