I want to do a fuel pump volume test on my 98 Mazda 62 2L GF, but the WSM doesn't say how long to energize the injectors:
I'll probably activate the injector by back probing the injector ground wire and then grounding it. I guess the Special Service Tool they use may have timing built in.
According to agcoauto.com the length of time that you are supposed to let the fuel flow is 15 seconds. In that period of time, you should have collected at least 1 pint of fuel.
However, you should also be watching the pressure to make sure it remains relatively constant. If the pressure hesitates and spurts, the fuel pump will not be able to provide a constant pressure to the engine when it is running.
