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Fuel Pressure

ARTZ

By ARTZ,
in Engines & Forced Induction

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ARTZ Grand Master

ARTZ

Posted
Posted

So I found a leak on my rail the other week, dodgey o-ring..no worries welded a bung in it problem solved..

fit it all back up and prime..

Now with ignition still on ,fuel pressure hits 3bar , then ever so slowly drops down to about 1-1.5 bar then sits there..

I haven't started it up yet and I can't find another leak anywhere. but is it right that it drops still, or should it be holding at 3 bar?

Just want to make sure before I bolt all my pipes back up..

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bzkr33 Community Regular

bzkr33

Posted
Posted

From memory my stock pump would prime up to the same and if you left it sitting, it would slowly drop to around about 1.5 almost 2bar as well.

I don't remember the definite numbers but it did drop significantly, with my nismo pump it primes up high and very slowly drops slightly not much though.

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scotty nm35 Grand Master

scotty nm35

Posted
Posted

Not if there is no leaks... How long does it hold 20psi though?

Wind the reg up and test it at 70psi, then drop it back to where it was. Make sure its running the same pressure though, or don't boost it before the retune.

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