I've had both plastic engine covers off a couple of times looking for the fuel rail shrader valve and I'm lost.

I can't find it located in the JTIS info or alldata.com site. Can anyone tell me where this valve is located?

 

JTIS states that it is located on the Fuel Rail but I could not locate it on my car.

When servicing the Gas Tank, the test port showed up inside the trunk, between the Gas Tank and the Gas Filler Tube. I could not find it on the Engine itself.

 

On my 4.2 the schraeder valve is all the way in the back next to the throttle body.. I think it's blue.

 

Where in the JTIS does it talk about this? I couldn't find anything on the subject.

In the trunk...that figures..

I like the picture of your car, it looks exactly like mine execpt for the rims and the vents in your hood. Wish I had an R.. Wish I had an R..!!

Thanks Paul

 

I've crawled into the engine bay of this 4.0 looking for this without any luck. Usually Ford and Chevy put them close to the throttle body. Jaguar hid this one very well. Maybe it's next to the floor board 3/4 of the way under the car...

Thanks whiteSTR

 

It appears to be on the pipe the connects the two injector rails.

 

JTIS (Issue 21) XK 2000 my Section 3 (Powertrain), Section 303-04 (Fuel Charging and Controls), Discription and Operation, Fuel Charging and Controls.

This section shows the Fuel Rails for N/A and S/C Engines, but does NOT show the locations of the Schrader Valve.

When my Engine would not start this spring, I looked for the Shrader Valve but could not find it.

Subsequently, I diagnosed both Fuel Pumps open circuit,and had them replaced by a local independent repair shop.

When the Panel at the rear of the Gas Tank was removed, I saw the Shrader Valve.

 

Ken: On my 4.0 XKR, the there is a hose (Not a Solid Pipe) connecting the Left and Right Fuel Rails (At the front of the Engine).

The JTIS Drawing shows a Shrader Valve on the Front end of the Left Fuel Rail. I found it. It's hidden under other wires and hoses. It has a Blue Cap.

Nevertheless, I remember seeing another Shrader Valve in the Trunk!!

The JTIS Drawing of the N/A Fuel Rail does NOT show a Shrader Valve on the Fuel Rail. However, this may be due to a Incorrect Drawing.

EDIT: A different JTIS Section shows the XK8 Shrader Valve Location. It is shown at the REAR of the Right Fuel Rail:

 

Nice job with the illustration!

 

Thanks: For anybody that is interested my proceedure was:

1) Find illustration in JTIS.
2) Press PrtScr (This saves entire Screen Image to
Windows ClipBoard)
3) Open IrfanView (or similar program, Windows PAINT will work) and select Edit and Paste.
4) Crop Illustration.
5) Save as jpeg.
6) Upload to PhotoBucket.com
7) Use Pic URL from PhotoBucket To enter Pic on
Forum Thread

 

you may find that the shrader valve in the trunk is for checking the evap system and not fuel pressure.

 

I think you're right. I looked at the illustrations of the Evap System in JTIS and none of the components seem to show a Shrader Valve, but it makes sense since the Trunk Valve is near some of those Components.

 

Okay I found it. I have JTIS version 1.3 and it doesn't containe the section you pointed out. Time to upgrade my program.

Thanks Paul



Mark

2000 XK8

 

I found it Paul, thanks. My JTIS is version 1.3 and doesn't have the fuel section in it. Time to upgrade!!



2000 XK8

 

Well, I decided to inspect the Trunk Area to look at the "Shrader Valve" that I observed after the Fuel Pump Repair.

It turns out that it's actually a COAX CABLE CONNECTOR with a white end cap on it. It's at the end of a Coax Cable that goes into the wiring harness.

Well it looks SOMETHING like a Shrader Valve.

Anyway, It's the connector for the Navigation/GPS Antenna. My car does not have Nav, so the Connector is Capped off.

Time for a annual Vision Test!!!!