Ok.. i have a fuel pressure regulator on my dohc ZC and i have it set at about 50 psi( when i take out the vacuum hose off the manifold) then at about 41-42 at regular idle.... well.. i was checking the pressure when i gave it some gas and it seems that when i step in the gas the pressure rises about 5 psi for about a second and then it drops back to 41psi even if i keep the engine to about 4-5k rpm... shouldnt the pressure stay constant or at least rise to 50 psi when at WOT?? is it normal?? any help will be appreciated...
thanks in advance

 

Your car isnt moving, yes its normal.