olddog There is NOTHING for you to clean. It's internal. the only way is to hook a pressure cleaner to the rail and run the car this way. The other end of the injector is pretty much self cleaned. The fuel power washes the pintle end. Unless you have the little screans for the inlets, they break when trying to remove them. They are not reusable. With out those screens large partical get into the injectors and shut them down or get stuck and the injector can't close. You get a leak down problem that washes the cylinder down and will in a short time wipe out the bearings in the motor.
Gas and
oil don't mix. I have seen this more than once. No, it's was not me. $2,600 to rebuild short block.
Rick L.