[Shotimes] Starting Fuel Pressure

[Kevin & Cheryl Airth]

Maybe I am misunderstanding what you are saying?
 If you disconnect the fuel line and turn the key on without cranking the
engine, What happens?
 The fuel system has no pressure and if the pump brings it up to 39 psi you
should have a healthy flow of gas out the line that does not stop. Right?
That does not happen. If you have ever changed your fuel filter you have
seen this. Since changing the filter drains a lot of fuel out of the lines
as well as the large filter body itself when you start the car you have to
crank a long time or cycle the key off and on to fill everything back up
before it will start. Or when changing the filter, before installing the new
one. Go turn on the key and see if the gas keeps pumping out.
.
.


> Read it again Kevin. "Turning the key to ON causes the fuel pump to run
for
> one second TO PRESSURIZE THE SYSTEM."
>
> The system is a closed pressurized system. The system runs at 39 psig. set
> by the regulator. The internal pressure relieve inside of the pump kicks
the
> pump off at 123 psig. if the line is blocked. If your injectors are not
weak
> there's pressure in the system before you turn the key on. Turn the key on
> and you add more pressure up to 39 psig.. Go out to your car now and
depress
> the shrader valve and see if gas doesn't blow out onto your hand.
>
> Relieve all of the pressure then turn the key on and go out and press the
> valve again and let me know if you get gas under pressure blowing against
> your finger/hand and all over the engine.
>
> A couple of ounces of gas makes these engines run a long time. A can of
Pro
> Clean injector cleaner from NAPA, alone with the fuel pump tripped (smack
> the switch in your trunk) runs the engine for 15 to 20 minutes.
>
> Just how long do you think it takes to pressurize a 3/8" line that's in a
> pressurized system and already under pressure before you turn the key on?
>
> ----- Original Message -----
> From: "Kevin & Cheryl Airth" <clubairth@cajunnet.com>
> To: "SHO GOS" <shogos@earthlink.net>
> Cc: "SHOTimes-New" <shotimes@autox.team.net>
> Sent: Tuesday, December 17, 2002 7:19 AM
> Subject: [Shotimes] Starting Fuel Pressure
>
>
> > > Turn to page 156 in your Probst book and the first sentence in the
first
> > > paragraph in the right column states: "Turning the key to ON causes
the
> > fuel
> > > pump to run for one second to pressurize the system.
> >
> >
> > Correct. It is time based only! The system does not do anything but run
> the
> > pump for 1 sec. The pressure is not measured and could be anything from
0
> > psi to 39 psi.
> > .
> > .
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