I keep having an issue of a primary injector popping out of the fuel rail. It drops down into the center plate intake hole way too far. Is there supposed to be space for it to fall in like that? I just rebuilt the engine and all of the injector seals are new.

I've swapped the injectors and the problem is always at the front rotor hole no matter what injector is in there.

Not my video but this is the problem. I understand he said it was a clogged injector in the comments but I don't understand why it wouldn't follow the injector if that was the case.

https://youtu.be/vNuXpaHQojw

Is this really how these injectors are set up? Theres no spacer in the bottom to prevent this? It seems like it's a big point of failure. I remember the lower seals staying in the engine when I removed the injectors but I don't remember how far down.

Any input helps. Thank you.
This is the last step before I can get this thing to finally run and its frustrating that I'm so close and falling flat.

 

There is a plastic spacer between the primary rail and the mounting point on the iron.

 

I have the vacuum block in place. But the injectors just easily slide into the iron. I can see how having 65psi behind them pushes them out so easily without a retainer.

I'm at a loss because this doesn't seem to be a common problem so I have no feedback. And for the same reason I feel like I'm missing something obvious.

 

Have these injectors been removed before? There's a large rubber grommet that fits on the bottom of the primaries injectors, out of sight in your video. Sounds like those may be missing?

 

Yes, it must be missing the the rubber sealing cups on the end of the injectors

 

I do have the primary rubber grommet on the bottom. It's still falling into the hole. And the rubber grommet is new. It came in a rebuild kit and it's a mazda oem part.

 

Look up InjectorLogic. That's the page name on FB. Guy rebuilds RX-8 Injectors all the time. He can get u an answer or the correct part u need.

 

I'm thinking that 5 months later it was already resolved

 

Just putting it out there incase someone else is needing them cleaned, didn't mean no harm...

 

He had the correct parts more than likely and was doing something wrong, but you can get those parts almost anywhere. When it's installed fully the fuel rail pushes them down fully and seals the face. It doesn't seal around the perimeter. My Injector Dynamics race injectors only have a flat face O-ring on the end that only seals on the face. The tip of the injector sticks through a center hole down into the port to keep it all aligned.