Rail Pressure Gauge:  This is optional and will only display if you have the rail pressure option (only available for some TST POWERMAXCR™ serial numbers 5000 and above).  It will display the rail pressure in thousands, so 15,500 psi will display as 15.5.

Rail Pressure Control:  This is optional and will only display if you have the rail pressure option (only available for some TST POWERMAXCR™ serial numbers 5000 and above).  It will control the rail pressure increase, OFF (stock, no rail pressure increase), 1, 2, . . . up to 9 levels.  On the Economy program only: the last level is rail pressure reduction, which shows “-9”.  This is for when you need to reduce smoke.  It reduces rail pressure to cut power about in half.  On all other programs, level 9 is the maximum rail pressure increase.  On the tt05/tt03 programs: Warning, rail pressure levels 8 and 9 will exceed both the sensor and bypass valve limits and will most likely blow the bypass valve.