[xj-s] New XJ-S owner with Questions

This past weekend my wife and I became the proud new owners of a
1989 XJ-S convertible to go with our XJ6. It has a few small
problems and one major one: The major problem is that it doesn’t
run, it had been running 3-4 weeks ago according to PO, but I take
that with a grain of salt… So far I have found that I have no
spark on either bank, and do not hear any injector clicking at all,
so from what I’ve learned from archives is to check front
crankshaft sensor resistance, but haven’t found that wire yet, but
I’ve found a few other things that don’t look right. So here come
the questions:

Which side of engine does this wire run on?

On the Fuel rail, left side is a valve, ‘‘EAC5086 Thermal valve’’
with nothing connected to it, what should be plumbed to this valve?

On the Throttle pedastel there is a micro switch on the back side
that looks like it would engage near full throttle with a connector
broken off, is this the kickdown switch?

The car came with the 4 volume set of Jaguar service manuals but I
have not found these particular items labeled or desribed in them.
It has the Marelli ignition, so I will have to build the warning
circuit in Kiby Plam’s book or live in fear of the call from the
wife about the fire, that would not be a good day. For the price
we paid I can fix quite a bit of stuff before getting in too deep
so if you have any other must check fix items send them on. I
haven’t got all the way through Kirby’s book yet just using
relavent sections until I get it running.

Thanks for any help,

Thanks for your help,–
Ron R. 1979 XJ6 Series II
Scapppoose, OR, United States
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In reply to a message from rsquared sent Wed 13 Jun 2007:

Ron,

Can’t help with the location of crankshaft wire routing.

Vacuum hose routing for EAC5086 is shown on my website.

The switch at the rear of the fuel rail IS the tranny kickdown
switch.

Good luck with your new vehicle.

SD Faircloth
www.jaguafuelinjectorservice.com–
www.jaguarfuelinjectorservice.com
Jacksonville, Florida, United States
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In reply to a message from rsquared sent Wed 13 Jun 2007:

Ron,

Sorry…the switch at the back of the throttle pedestal is NOT the
kickdown switch. The kickdown switch should be at the left rear of
the fuel rail.

The switch you describe is the ‘‘full load fueling’’ switch. At WOT,
the switch activates, and eliminates ‘‘closed loop’’ operation…
(ie…the engine goes ‘‘open loop’’)… to increase fueling, as
governed by the ECU mapping tables.

SD Faircloth–
The original message included these comments:

On the Throttle pedastel there is a micro switch on the back side
that looks like it would engage near full throttle with a connector
broken off, is this the kickdown switch?


www.jaguarfuelinjectorservice.com
Jacksonville, Florida, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

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In reply to a message from SD Faircloth sent Wed 13 Jun 2007:

Welcome to the club…have fun with your new toy!–
Lead 88 XJS V12 HE Coupe
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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