I am not employing a vacuum reference for that gasoline stress regulator, as I have it set to a fixed pressure of 60-62 PSI like the original returness gas system for the BEAMS. This style and design gets rid of the restrictions and inefficiencies related to a single throttle system. https://4age-engine-for-sale66418.wssblogs.com/39123358/what-does-toyota-4age-for-sale-mean