I am asking you to go out to your cars and check your voltage of your fuel pumps, at idle and while running. Under your storage bin behind the drivers seat are 2 wires covered in a plastic shroud, it comes together with a white plastic plug, then goes through the floor through a gromet to your pump. I placed my two leads from my multimeter in the actual plug itself from the back to get the readings, i just put my MM on my center console to monitor it. I am running like 12.5-12.7 and then the sudden surge or 13+ where my fuel cuts out. I'm trying to figure out why and what my problem is.

What are you people out there with FI cars getting for readings?

 

13vs on a fuel pump reading doesnt suprise me the voltage is not your problam try doing a fuel volume test and fuel pressure test see what you come up with fuel pumps go out easy if you let your car sit with the same gas for awhile (my exsperince not accualy fact)