i have a 93 da with a ls/vtec i am runing a p61 the porblem i am haveing is when vtec should hit the oil pres. drops from around 90 psi to around 60psi and it makes no sound like vtec hits the engine sounds the same.the head was deassembled when i got it does anyone know if i could have done anthing to make vtec not work need help bad

 

Hi, I did not understand what you mean. Could you please explain again?