Dewalt Dxpw3425 soap injector repair help

Installed new rebuild kit but still does not pull siphon. Double checked installation correctness, using correct tip as well. Any thoughts on next DIY would be appreciated.

Not sure what pump is on that unit but maybe just go buy a down stream injector and forget about using the one on the machine …
How long is your pressure hose I know once you hit 200 feet you start having trouble??

Thanks for reply
I believe it’s a Simpson pump and SI is currently downstream of pump. 50ft of hose now max 150 and it use to work fine. It took a little longer to reach nozzle. Maybe just adapt a new injector just past current? Can’t take current one off, it’s part of manifold that bolts to pump.