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Thread: Fuel rail

  
  1. #1
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    LordNikon's Avatar
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    Fuel rail

    Test port - is this on the high pressure side, i believe it is but have nothing to test it with exactly !

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    im sure that mine is post regulator, as this would give a pressure reading on the rail at the injectors, and would show if your regulator was faulty.

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    not looked at mine but6 it would be pointless being on the return side. They have always been on the high pressure side so far
    Be Happy


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    Looking at the info i have read it would seem its pre-reg, but have then found other info to say its post-reg .... typical !

    I was under the impression the entire rail was on the high pressure side until it hit the regulator and then went low pressure return

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    in theory there would be 2 readings, the pre reg and post reg, post reg being lower.... as long as there was enough delivered pressure at the reg, then the injector pressure should remain the same..... i did`nt mean the return side jal, just post reg on the rail m8. confused !!

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    You're right in how it works, but there is a specific test port on the top, which i need to know if its pre-reg and under high pressure rather than lower pressure return

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    just had a look, it was killing me... ! its def post reg, small access valve with a black cap, bearing in mind though, mine is a zlet.. should be the same. HTH

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    They should be pre reg, as with any engine. You don't need to know FP after the rail...

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    just looked under the bonnet of my VXR. The connector is slap bang between injectors 1 and 2 on the high pressure side. Exactly as it always has been. When I did my Bosch fuel injection training we were shown how to check the fuel pressure system in all ways. This is no different than any other Bosch system.
    Be Happy


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    Thats the place, defo small black screw off cap on it, with push down strada (???) valve in it. If its high pressure side then i can tap my NOS fuel uptake from this directly ...... i pressed the valve this morning and fuel seemed to piss out quite happily so its under a fair bit of pressure lol

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