S4 vs. S5 Secondary Injector Differences
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S4 vs. S5 Secondary Injector Differences
I'm trying to install S4 secondary fuel injectors onto an S5 upper manifold but the injectors seem too short. I have placed the diffuser (proper name?) into the injector seat in the manifold and then placed the rubber spacer on top of that. When I seat the injector in the manifold and install the fuel rail, the injector doesn't protrude far enough into the rail as the O-ring can still be seen.
Now either I'm really tired and I messed something up, or somethings going on here. Are the S4 and S5 injectors different?
Thank!
Now either I'm really tired and I messed something up, or somethings going on here. Are the S4 and S5 injectors different?
Thank!
#3
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The injectors lengths are the same. I take it you're using the S5 secondary rail? I think the S4 rail would bolt up, but clearly not fit right. You're also using the S5 diffusers too?
I had no trouble at all when I used an S5 UIM, secondary rail & diffusers with S4 injectors. They seated properly.
I had no trouble at all when I used an S5 UIM, secondary rail & diffusers with S4 injectors. They seated properly.
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Diffuser and rubber spacer installed:
Diffuser only:
Injector seated at full depth:
Injector with fuel rail in place:
I think the problem may be that I'm using S4 primary injector diffusers. Can anyone tell this from the pics?
Thanks!
Diffuser only:
Injector seated at full depth:
Injector with fuel rail in place:
I think the problem may be that I'm using S4 primary injector diffusers. Can anyone tell this from the pics?
Thanks!
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#13
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Your problem is the S4 diffusers, which are not meant to be used with S5 air bleeds. The S5 diffusers are taller, and have 2 o-rings. Take a look at the difference here: http://www.mazdatrix.com/c-6.htm.
This is what it should look like with an S5 rail, S5 UIM, S5 bleeds/diffusers & S4 injectors. You can see the rubber grommet sticking up out of the manifold.
This is what it should look like with an S5 rail, S5 UIM, S5 bleeds/diffusers & S4 injectors. You can see the rubber grommet sticking up out of the manifold.
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