CTA Tools 3430   Gm Fuel Injection Tester Tester Indicates Problem Sources-Control Pressure Regulator, Fuel Distributors or Other Specific Fuel Injection Components Features a 3.5-Inch (90-Millimeter) Gauge with Dual Calibration-5-145-PSI / 25-1,000-kPa Includes Hose Assembly and Quick Disconnect Heavy-Duty Construction Allows for Strength and Durability For Use on Multi-Port Fuel Injection Systems