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After talking to a Mazda tech about testing fuel pressure who told me there was a schrader valve under the cap at the end of the fuel rail I decided to see for myself. While this would make testing fuel pressure very very easy I had my doubts since no one had ever mentioned this before.



As you can see, there is no valve to be found. Though an adapter could easily be made to hook a small gauge up to for easy readings. Also notice the bore of the fuel rail is huge, so we should never need an aftermarket fuel rail like the Honda or Nissan boys.

So to recap, there is no valve at the end of the fuel rail to easily test fuel pressure despite what anyone may say.

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