[xj] how to test fuel changeover valve and symptoms of it's failure

XJ
1

I have found a spare fuel changeover valve laying around my
shop (go figure?) and it was dirty dirty dirty. Given my
recent fuel problems, a rusty tank (which I have) compounds
the problem but isn’t the source, the changeover valve is.
So I cleaned it out carefully with qtips and rubbing alcohol
(carb cleaner wouldn’t work) and I can pour the alcohol in
to one end and it only comes out of one side of the two
holes. But how should I actually test it? If I put 12v
across the valve, should it make noise or click or something?

The car (87 xj6 s3) in addition to fuel leaks out of a tank
that has already been drained (bad changeover valve) also
thinks it’s cute to stall out in traffic when fuel is in the
driver’s side tank, the side that isn’t leaking. It acts
like no fuel is getting to the engine. Stomping the throttle
does not help, pressing the fuel tank selector to the other
side usually helps. Both nonreturn valves work. is this the
fuel changeover valve being bad?

Thanks,
Chris

1987 xj6 s3 LHD ‘‘kitty’’–
SOLENT BLUE IS PEOPLE! SOLENT BLUE IS PEOPLE!
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2

If I put 12v
across the valve, should it make noise or click or something?

The car (87 xj6 s3) in addition to fuel leaks out of a tank
that has already been drained (bad changeover valve) also
thinks it’s cute to stall out in traffic when fuel is in the
driver’s side tank, the side that isn’t leaking. It acts
like no fuel is getting to the engine. Stomping the throttle
does not help, pressing the fuel tank selector to the other
side usually helps. Both nonreturn valves work. is this the
fuel changeover valve being bad?

Thanks,
Chris

G’day Chris,
Yes it shoukd click. Try blowing air from one inlet side to the
other to make sure it seals ok in both positions. When there’s no voltage
applied the valve will be in the left tank position. See how it goes after
you change the valve.
regards,
John Hudson
Brisbane Australia
71 SI XJ6, 85 SIII XJ6----- Original Message -----
From: “Chris Diamond” flak_monkey@comcast.net
To: xj@jag-lovers.org
Sent: Tuesday, March 28, 2006 1:18 PM
Subject: [xj] how to test fuel changeover valve and symptoms of it’s failure

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: Jag-lovers Forums - Jag-lovers

To remove yourself from this list, go to Jag-lovers Forums - Jag-lovers.

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