Toyota Repair Problems? Ask a Mechanic for Answers ASAP
Hello, thanks for posting
It sounds like the computer is turning the injectors off, can you check live data and see what happens to injector duration when this happens? There should be no voltage measured at any of the injector grounds, there could be a ground problem somewhere else which causes a feed back voltage, where are you getting this injector ground voltage and how much is measured.? re check the other ground connections at the intake manifold.
What about the fuel pressure regulator, could it be bypassing too much fuel back into the tank? Something has to be happening to the fuel that the engine needs to get to higher rpm which you are substituting by spraying fuel into the intake
Ok, maybe pinch off the fuel return line and see what happens.
You're welcome, I've seen those leak before but not cause a loss of pressure, thanks for letting me know, good luck, please take a moment tp leave a rating.