Adding a gas tank return, & I have an important question that needs a couple of answers. MD

[Shannen Durphey]

Hi, Manny.

Restriction to flow usually causes an increase in pressure.  The flow through
the return line is greatest when the pump is running, the battery is fully
charged, there is vacuum on the regulator, and the injectors are not operating.

Install a pressure gauge on the return line after the regulator.  Engage the
fuel pump, use a vacuum pump to apply vacuum to the regulator, and then read the
pressure.  If you see 10 psi or above, generally you have a problem.

Shannen

Manuel Desantos wrote:

> My main concern right now is that I read somewhere that some of the
> return lines on some carbed cars had a small restriction where it goes
> back into the fuel tank.  This restriction will cause the fuel pressure
> to get very high.  I want to know how to check to see if I have this
> restriction without dropping the tank.  I am almost to the point of
> starting the motor to break in the new cam and see if the TPI works.

> Thanks
> Manny Desantos
>

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