i have a 1997 ford maverick 2.7tdi zexel fuel pump i believe there are 2 types ov no1 injectors 1 u can test with multimeter and other type u carnt test am i right so far as i think mine is the type u carnt test the car starts 1st flick idles perfect still feels little flat an veryvery slight misfire now its not the maf can somebody pls tell me the symptoms ov the no1 injector not working correctly and how it works pls