Toymods Car Club Inc: Tech & Conversions => Fuel pressure = 75PSI...on a stock 4AGE????What are my options for running new fuel lines???

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oldcorollas
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Kita-Ku, Sapporo, Japan
Registered:
January 2003

Re: Fuel pressure = 75PSI...on a stock 4AGE????Can anyone help me out with this?

Mon, 28 November 2005 02:17

WHITCHY wrote on Sat, 26 November 2005 22:22

Mechanic said its most probably a blocked return fuel line, but when I changed the fuel pressure regulators on both ends of the fuel rail the flat spot disappeared for about 10mins then it came back again! Something is screwing out my fuel pressure regulators and its really annoying me!Can a fuel pressure regulator even get broken?don't they just operate via vaccum, so how can they break, let alone be broken within 10mins of installation?-Whitchy-

well, one end is a damper and the other end is a regulator... do they look different on your rail (stranger things have happened)

if the vac source was rooted, it would go to about 40psi + atm = 55psi ish...

75psi is far too high.

as suggested, try running return to a jerrycan and see what happens... it must be a blocked return if you have changed the reg and it still does it...

they can break... but would be more likely to fail open, giving no pressure?? maybe???

you could also try hooking up the rail inlet to the rail outlet (ie, with no reg) but with a gauge, and see what the pressure is when the pump is freely flowing back thru the return.. pressure should be minimal, but if not, it tells you that there is definitely a blockage...

good luck!

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