TU-32-20 Diesel Fuel System Pressure Test Gauge - Compucheck for Cummins Diesel Engines and Other Diesel Engines. TU-32-20 Diesel Fuel System Pressure Test Gauge - Compucheck. For use on Compuchek test ports on the fuel system of Cummins diesel engines, as well as other diesel engines that have been outfitted with the Compuchek test ports.
