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Fuel Rail Schrader Valve

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Old 07-02-2018, 12:28 AM
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Default Fuel Rail Schrader Valve & How to Depressurize fuel system?)

Hey guys, I'm looking for the Schrader valve on the fuel rail to check the pressure. Can't seem to find it, in fact I didn't think there was one, but the workshop manual says it exists. Anyone able to shed light on its location? I'm also trying to figure out how to depressurize the fuel system. The manual claims a special tool is required. Could I just pull the fuel pump fuse or relay like I do on my XJS?
 

Last edited by Dymaxxion; 07-02-2018 at 02:35 AM.
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Old 07-02-2018, 12:34 AM
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I looked around for that a few days ago on my 2007 coupe, and could not find that valve. I do not believe it exists.
 
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Old 07-02-2018, 02:35 AM
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I found this in the X150 manual while trying to find out how to depressurize the fuel system. I can't find it on my car unless I'm blind.

 
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Old 07-02-2018, 01:22 PM
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Originally Posted by Dymaxxion View Post
I found this in the X150 manual while trying to find out how to depressurize the fuel system. I can't find it on my car unless I'm blind.

That diagram in Step #2 appears to show the fuel line disconnect point to be on that valve, but on my '07 convertible, the fuel line disconnect is right at the fuel rail (well almost, just a short pipe to the fuel rail).
So I'd agree with Patrick, in that it doesn't exist on our XK, maybe on the XKR or some other Jag model.
To relieve the pressure, I just followed Patrick's advice in another thread, and pulled fuse #33 (between the rear seats) while the car was running. Car stopped immediately, and there was no pressure when I disconnected my fuel line.
 
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Old 07-02-2018, 02:00 PM
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[QUOTE=kj07xk;1922753]
So I'd agree with Patrick, in that it doesn't exist on our XK, maybe on the XKR or some other Jag model. [QUOTE]
I know the XK8 had a rail Schrader Valve similar to that one. What a Nuisance that they'd get rid of it but discuss it in the workshop manual.
Thank you. Didn't wanna just do that and damage something.
 
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