[xj40] 1994 XJ 3.2 S Firing Order?

XJ40
1

Hi All

This is my first post, I have a 1994 xj 3.2 S which is causing me a
number of problems lately… today I have been replacing the Cam
Cover Gasket (for the 2nd time !) - and while I was not paying
attention my son decided to re arrange the plug leads for me by
pulling them out of the Electronic Ignition end !!

My Haynes manual only shows the firing order for a car fitted with
a distributor, whereas my one has a potted block on the drivers
side bulkhead… can anyone give me the firing order for this car
and indicate which lead relates to which connection on the unit ??

…many thanks in advance

Dan S–
DanS
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2

In reply to a message from DanS sent Tue 18 Feb 2003:

Hi again

…since my first post I’ve been doing a lot of reading and looking
around here and at other Jag forums, and I’m starting to wonder if
what is fitted to my car is an aftermarket ignition unit…

…can anyone tell me if they have, or have seen such a unit fitted
to a Jag of similar year (1994 3.2 S) - all of the other stuff that
I have read describes a distributor based system, which this
obviously is not…

…it’s rectangular, about 8 inches by 4 inches, sits near the
inner wing at the drivers side (RHD) bulkhead, has a connector
block on the left side, and is a solid green/olive potted resin
block with six lead connector sockets.

It sits in a metal housing a bit like a battery carrier, and has no
obvious markings - is held in by 4 allen screws, and from the
condition of them I’d say it had been there from the beginning, the
screws are a bit corroded, but not too much, and the car overall is
completely corrosion free, aside from the odd bolt head etc, which
is why I think this has been on it since the start…

…if anyone has any idea what this is puuulllleeeasse let me
know… I was trying to solve a couple of other problems yesterday
morning, and now I am totally stuck with this situation which means
I cant do a damn thing till I get it identified !

…and the moral of the story is… buy your 4 year old coveralls
by all means… give him some spanners to play with sure… dont
let the little angel ANYWHERE NEAR the cat !!

Cheers

Dan–
DanS
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3

In reply to a message from DanS sent Tue 18 Feb 2003:

Hi yet again…

…it turns out to be a Ford unit and has a Serial on the front of

919F 12029-AA 12V

…does that mean anything to anyone ?

Cheers

Dan–
DanS
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4

In reply to a message from DanS sent Wed 19 Feb 2003:

Dan,

I was not aware that Jaguar fitted such a thing, but if they did,
two suggestions.

a) Phone a Jag dealer and ask.

b) The engine must have the same firing order as any other AJ6 so
you have perhaps four chances if the outlets from the electronic
unit are in a straight line:-

(i) Fit the leads in sequence, 1,2,3,4,5 & 6 or 6,5,4,3,2 & 1
(ii)Fit the leads in firing order 1,5,3,6,2 & 4 or 4,2,6,3,5 & 1.

What’s the worst that can happen?–
Bryan N ('91 Sovereign)
Cambridge, United Kingdom
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5

In reply to a message from DanS sent Wed 19 Feb 2003:

Hi There

…well! - tried phoning the local Jag dealer and he was clueless
also… so I phoned the dealer that sold it to me… it turns out
that my car is the prototype 3.2s and once built had been passed to
Chasseur racing (an offshoot of Tom Walkinshaws outfit) to
be ‘sportified’, at which point it was used by Jag to decide what
to add to the rest of them - I was aware that they only made the
badged 3.2s for 10 months, but had no idea about this lot… it’s
fitted with an Alpha ECU and associated electronic gubbins… I’m
waiting for the dealer to phone back with the name and number of
the guy at Omega racing that mapped the ecu and who will (I am
assured) be able to give me the necessary… thanks for your reply
and I’ll keep you posted !

Cheers

Dan–
DanS
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6

Dan,

Sounds like you are describing a “distributorless” engine
design as is similiar to any model using both crankshaft
and camshaft position sensors. You must have both of these
sensors (along with the necessary Engine Management
Computer software) for a distributorless design to work.

I’ve never heard of an aftermarket or factory
distributorless design for XJ40s. But, no doubt the design
is possible. Although X300s are distributorless, they
don’t use a remote coil. Instead they use a coil-on-plug
design. 1-5-3-6-2-4 is the standard inline six cylinder
firing order and would be the same for your engine as
well. If the “six pack” ignition coil/module isn’t marked
(for the appropriate cylinder) on the high tension
towers … you may have a real problem.

Good Luck sorting the configuration out,

John P.

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7

According to the good old Internet, 12029-AA is used by Ford to describe
many of its ignition coils. In 1994, their 6-cyl cars used part numbers
DG-456 and DGE-456 for distributorless coils.

Maybe someone in the US could call a Ford dealer for you and get them to
look it up on their database.

Regards,

Adrian-----Original Message-----
From: DanS [mailto:i_dicks@yahoo.co.uk]
Sent: Thursday, 20 February, 2003 01:22
To: xj40@jag-lovers.org
Subject: Re: [xj40] 1994 XJ 3.2 S Firing Order ?

In reply to a message from DanS sent Wed 19 Feb 2003:

Hi There

…well! - tried phoning the local Jag dealer and he was clueless
also… so I phoned the dealer that sold it to me… it turns out
that my car is the prototype 3.2s and once built had been passed to
Chasseur racing (an offshoot of Tom Walkinshaws outfit) to
be ‘sportified’, at which point it was used by Jag to decide what
to add to the rest of them - I was aware that they only made the
badged 3.2s for 10 months, but had no idea about this lot… it’s
fitted with an Alpha ECU and associated electronic gubbins… I’m
waiting for the dealer to phone back with the name and number of
the guy at Omega racing that mapped the ecu and who will (I am
assured) be able to give me the necessary… thanks for your reply
and I’ll keep you posted !

Cheers

Dan

DanS
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting
services and resources including Photo Albums, Event Diary / Calendar, On
Line Books and more !

Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !