I just had a shop put in a b16a in my 90 seden. When the car is in idle the oil pressure drops between 1-5psi but when you are moving the pressure is fine. I am using an electrical gauge to see the psi. I have replace the sensor and the vtec sensor still no change plus the knock sensor keeps tripping and it been change to it driving me nut since i have not be able to drive this car hardle. Also the car vibrates real bad when in idle and while driving. Any help would be great. Thanks

 

wow thats extremly low........i would be concerned with anything below 20psi at idle warm. 5psi and below is enough to trip the oil pressure dummy light. the motor wouldnt happen to be knocking would it?

 

no it quiet and the light use to come on then it stop. And it takes several minutes for this motor to idle right because when you first start it i like to stay around 3000 rpm till it warms up.

 

used a pressure gauge and it hold at 15psi at idle i am going to change the oil to either 10w-30 or 20w-50 and see where it sits