S & G Tool Aid 33980 Fuel Injection Pressure Tester with Two Gage Designed to test gasoline fuel pump pressure on most domestic and imported fuel injection equipped vehicles Includes 2 gages for accurate testing and large gage is calibrated from 0-100 PSI as well as small gage is calibrated from 0-50 PSI Easy to hook up and read Test all Ford vehicles with multi-port fuel injection systems