Re: Soaking a FI assembly to dissolve crud?

Unless it says otherwise, the spec is probably for fuel pump running and
engine NOT running (zero vacuum). That will probably be a bit more than at
WOT because of the lack of fuel demand bringing the pressure down somewhat
despite the regulator. If the spec is 23-30 psi, that sounds alright to me..

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from [EMAIL PROTECTED]
Home Page: http://www.roberthancock.com/


"dstvns" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Tue, 02 Dec 2003 02:19:56 GMT, "Robert Hancock"
> <[EMAIL PROTECTED]> wrote:
>
> >Are you sure you're measuring the fuel pressure correctly? If the spec is
a
> >"dead-head" measurement and you're measuring at idle, your measurement
will
> >be low because the fuel pressure will drop with increasing engine vacuum.
>
> The gauge is built into the dash, but I forgot to give the
> full-throttle reading in the original post.  The reading at full
> throttle (zero vacuum...I also have a vacuum gauge) is 23 psi...the
> bare minimum.  I've checked the line repeated times for leaks and
> haven't found any, nor any smell of gas leaking.
>
> The car activates the fuel pump for 5 seconds and pressurizes the fuel
> line when the key is in the ON position, just before I crank and
> start.  When the pump is working, and the car is OFF, it temporarily
> reaches 23psi, then comes down and stays at 17.   When I pinched the
> fuel return line with vice grips, it rose to about 30psi.  During
> accelerations and decelerations the pressure ranges between 17 and
> 23psi.  It only reaches 23 when the pedal is at the floor.
>
> Dan
>