Leaky Schrader's valve
 

Good afternoon folks -

'98 F150 5.4 4x4 165k
It has been some time since the last post but this is a good one. The ol'ford was stalling and idling poorly at intersections. A buddy suggested maybe it was a fuel pump since his truck did the same thing prior to replacing his fuel pump. So i went down to autozone and purchased a fuel gauge to check the fuel pressure.

Fortunately, it was not the fuel pump since it was reading 35 psi, so i ran my scanner for grins and giggles - and the following codes were returned P0171 and P0174. Upon doing additional research, I discovered the rubber elbow from the PCV hose connecting in the back of the intake was nonexistent.

I replaced the elbow, cleared the codes, removed the fuel gauge, and took her for a test run...... During the test run, I could smell fuel, so i returned home ASAP.

The schraders valve was leaking fuel. Is there a way to fix this without replacing the entire fuel rail? Has this occurred to anyone else when using a fuel gauge?

Any and all insight is greatly appreciated.

just a thought:
:eek: Just to be safe, releive fuel rail pressure however you do it.:thumbsup:
Try to reseat the schraeder valve, using the adapter you used to check fuel pressure. and if that does'nt work, try a valve stem tool. If that dont do it, a small phillips screwdriver to jimmy the schraeder valve up and down a couple of times. i belive these are worth a try other than gettin a new fuel rail!
oh yeah, NO SMOKIN!:smoke:

i've never looked inside at the schrader, if there are threads inside it like a tire valvestem it can be replaced.
if there are no threads prolly have to replace the rail.
i would fiddle with it for awhile just to see if i could get some trash inside it to loosen up :thumbsup:

Yea , the schrader is just like and intertube stem set up - it unscrews with a valve stem tool.:thumbsup:

Did you put the cap back on th shrader valve?

Here is an update thus far -
I have placed the fuel gauge back on and off.... still leaking.
Suppressed the valve with an nail a couple times to no avail.

It is getting dark and the Suns are playing tonight so I will venture to the dealer tomorrow and see what, if any, parts are replaceable on the schrader valve.

I will post an update midday tomorrow.....

Thanks for your input and keen insight about no smokin'. :)

As always thank you!!!!


One more note - I have placed a SS or aluminum tire cap to minimize the leakage.

Go to the auto parts store and get a tirevalve stem removal tool and a new valve stem and swap them out.