I've been having a problem lately with a low vacuum on my MSP. I've checked checked and rechecked for a vacuum leak and there is definitely not a leak anywhere on my piping or on the intake manifold. Did a pressure test on the manifold as well and the only place I leak any pressure is around one injector seal. Just got a boost gauge installed and the vacuum jumps around 8-10 inHG at idle, its very erratic. Considering I have no leaks then it leads me to believe that I may have a problem with my valves?? I have a 2000 626 engine block and head. I installed the stock MSP cams on the head. I'm not familiar with valve lash or whatever it is and dont know if having the MSP cams on there would be causing the issue or what.
Any input or help would be greatly appreciated.
Any input or help would be greatly appreciated.
