Just curious to know if you can test newly installed injectors for leaks. I hate to put everything back together and find a leak? thanks.

 

 

I'm not so sure on a Toyota as I had one with a carburetor, but on my Mazda EFI, the manual says to mount the fuel injectors in the rail, then mount the rail onto the intake plenum. This is of course all off the engine. From there, cycle the ignition on and off to check spray pattern. When the injectors are turned off, you can visually check to see if there are any leaks.