Question about 1995 Jaguar XJ12

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Wiring of coil packs

I am trying to wire some Emerald ECU's to a 1995 X300 V12 engine. The 2 coil packs have 4 blades on the input socket, I presume 1 is earth and the others are each for a pair of cylinders.

Do you know how i can find out which one is which please?

Kind regards,

Ken Pile

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I recently, April 12, purchased a 95 XJ12 that looks like it has minor problems. Its overheating. The Jag has been sitting for 2 years in a garage. It did not have a current title or local state plates, so it was sitting in the garage.

Anyway, I am restoring it. The prev owner gave me a Jag XJ12 DVD with all the manuals and diagrams. However, it did not have the diagrams I needed for the relays. So, I started to look for manuals. Nothing exists aside from the Jaguar OEM DVD and more expensive dealer paper manuals.

Unfortunetly, the 95 XJ12 has the OBD-1 system on it. I am in the process of finding a OBD-1 for the 95 XJ12. So far, none, but am calling OBD scanner companies.

The site below cost $17 one year and $50 5 years but it has all of the diagrams for all the relays, etc, repair instructions, ...

http://www.alldatadiy.com/contact/index.html

I purchased $50 plan since I plan to keep the JAG. I think its going to be a classic.

I would like to keep in touch with you to share info on self-repair tips.

If you want to split the cost for the site above email me.

victorhdz@ivisionis.com






Posted on Apr 25, 2009

  • Victor Hernandez Apr 26, 2009






    Does your 95 JAG XJ12 temperture guage run near the HOT, Red Zone, area?



    Is this normal? What does your temp gauge run at after 30 minutes?



    I was told that this range is normal since the engine has over 142,00 miles.

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1 Answer

I need firing order on 1998 Suzuki swift on plugs and cole pack


;post engine sizes? they used 3 engine, or more world wide
if it has a 4 wire pack the engine firing order is fixed by ecu
1342
but the COIL PACK must not be scrambled.
replace wires 1 by 1. (if new pack, mark old first)
if lost the org. pack is marked, 1,2,3,4 , if not you need
the marks, out of FSM or maker of new coil.
here is the list of engines, ;pick one>?

1.0 L G10 (LP2) I3
1.0 L G10T (LS3) turbo I3
1.3 L G13A/BA (L72) 8V I4
1.3 L G13B/G13K 16V DOHC I4
1.5 L G15A 16V I4
1.6 L G16 16V I4

if you cant use alldata.com to see that.
or cant use suzuki pit stop plus for $4
then google for your engine. and pray.

i can guess, because i can see the 2 coils there. in pack
and they are in series like this
1 <><><><><><<4 (series wound) the plastic case telsl me. this.
2><><><><><<> 3.
or group 2
2><<><><3
1><><<>>4

see? so try 1 ontop, run ok
no
try 1 in group 2.
this is called wasted spark
1 and 4 fire together.
then 2 and 3 as one;
so if 1 is connected right and 2,
then 2 and 3 must work if 1 fires right, see?
as you can see only #1 maters. if you now the coil end to end wiring.


tell country and engine, and all this is 100x more easy.
but ive never ever had to look it up.
the coil packs are obvious wired a certain way.
all in 2 guesses.

Jan 22, 2015 | Suzuki Cars & Trucks

1 Answer

I have a ford focus 2003 model.plugs number 2 and 3 are missfiring.is there posibbility that the Ecu has packed?


Check the connection to your coil pack for a corded or broken wire going into the connector. The coil pack is where the plug wires come from. Ford has a pigtail kit to replace it if it is bad. Or the coil pack is bad. Top, driver side of engine.

Only 1 in 10,000 PCMs is defective.

Nov 20, 2014 | 2003 Ford Focus

2 Answers

Jeep 3.7 cylenders 2 & 4 not firing


3.7 V6, mileage?

most likely the HV wires bad.

then bad coil pack.

did you check spark directly at the coil pack?

i use 2 known good HV wires to do that and 2 good test spark plugs.

both plugs grounded to engine (shell)

that is how you test any wasted spark coil pack. 3 coil pack.

if that fails the FSM shows, unplugging it and check the coil resistances. if wrong the pack is bad,

keep in mind the res. can read ok and coil be bad ,due to internal insulation break down (internal shorts)

if thats ok. the resistance , make sure the wires are not (primary)

to the coil (the low voltage connnector)

if that is ok, its mostly likely a bad coil, (pray not bad PCM)

if tool-less? start with cheap parts , work to expensive. (guessing)





now wasted spark 101.

if one line opens , both spark plugs die. no spark

the wasted spark is wired in SERIES. ( like Christmas lights)

the magic cuts cost of 6 coil\'s.

so if the HV wires are say, cheap , carbon wire and open

you lose, both spark plugs. use MAG wire and end this issues.

get some nice NGK mag wire or Bosch Mag wires.

you can see i hate carbon wire. for good causes.

(carbon string wire)

mag wires is real wire that is coil spun and is inductive. it

has the correct impedance but is not a resistor its and inductor.

and lasts the longest , and worth every penny.

Mar 29, 2014 | 2006 Jeep Liberty

1 Answer

My 2005 jeep 4.0l has dtc 2302 , hesitates, replaced pcm still has code


replacing PCM is the last, why do that. which jeep,? wrangler? GC?
ECU is not bad and is almost always (GIGO) garbage in ,nets garbage out, now and for ever....
all most all errors are
1: input errors.
2: or bad output actuators or gee the engine it self.


now lets work
2302
ever see this>? or the FSM, the FSM book is way cheaper than any knee jerk ECU swap.. ouch.
http://engine-codes.com/p2302.html
out of FSM. actual
(F342) ASD OUTPUT CIRCUIT
(K19) COIL CONTROL 1 CIRCUIT OPEN
(K19) COIL CONTROL 1 CIRCUIT SHORTED TO GROUND
COIL
PCM (last ) never 1st ever....
so the coil pack is 4 pins and 3 coils, one one is hot key on.
the other 3 are 3 coils, coil 1 is bad,,
from a pure tech stand point its.
1: bad coil (open or shorted) bad wires, open or shorted or bad ECU.
we never condemn any ECU unless we do the simple lamp tests.
etc. case in point below.
here are the FSM steps, so easy to do.... (truncated, read your FSM)
1: coil 1 removed, connector.
key on is pin 2, 12v, if no fix that first. ( bad power distra. or fuse)
yes, 12v. so.
then, use a test lamp to pin 3 and ground
Pin 3 is COIL 1, !
crank car , does light flash? (any small 12v lamp works) 0.1 amps are less.
1: yes, flash PCM good, coil bad.
no?
test lamp tests continue....
2: stuck on lamp , wire is grounded out or bad PCM (pull PCM C2 conn, ? still tuck on?, yes, bad harness !
3: stuck lamp off? . this is harness wire cut or PCM bad.-
check continuity end to end on this wire. if good , bad ECU.
on a car with nice clean harnesses, no damage to conn?
its a bad coil.
the coil can in fact can be bench tested...
that to, is in the books.
(ohms tests, and make real spark) do so but do not exceed max dwell on the coil "smoke tested boom."( you need a pulse generator , or coil tester)
easy to make them .
there you go.... ECU last. for ever and ever.....

Sep 27, 2013 | Jeep Cars & Trucks

3 Answers

1996 subaru legacy 2.2 Auto No Spark on front two cylinders. after new coil installed still the same.


Hello and welcome to FixYa!

The problem can be on the ECU (engine control unit). If the ECU is faulty there can be no spark to the wires even the coil is new. You may try swapping the ECU first.
Hope this helps and thank you for using FixYa! Have a good one!

Sep 01, 2011 | 1995 Subaru Legacy

1 Answer

Replace spark plugs in 1997 4 cyl. ford ranger


Hello, I will suggest you get these few tools before you with the replacement.
(1) Spark plug socket with rubber insert to hold plugs in place while inserting & removing.(2) 6inch extensions for your 3/8ths inch socket wrench,(1) Swivle Socket extension for your 3/8ths inch socket wrench.(1) 1/2inch socket for exhaust manifold screws. A little quantity of anti-sieze for the spark pluggs to be applied to the pluggs if they are proving difficult to get out.
Start with the 1st cylinder at the front of the engine on the passanger side.
STEP 1.
Twist & remove the spark plug boot from the existing plug.
STEP 2.
You have to use a very small flat edged screwdriver to open the clips that hold the plug wires together.
STEP 3.
Use a 6" extension & a 3" extension & your deep socket for the spark plug.
STEP 4.
Remove the first plug and replace the old plug with a new Bosch Platinum Plus 2 prong plug and use some anti-seize on the threads and tighten to the appropriate torque.
STEP 5.
Remove the old plug wire from the coil pack. It will be going to the 2nd coil pack (located to the rear of the first coil pack) and install the new plug wire in the coil pack.
STEP 6
Repeat steps 1-7 for plugs on 2 & 3.
STEP 7.
To remove Plug #4 which is the last plug on the passanger side,you have to remove the two (2) 1/2inch bolts that holds a bracket to the exhaust manifold. Make sure you spray the studs these bolts are on with some DW-40 or liquid wrench. The exhaust manifold studs might have a lot of rust & being difficult to turn nuts off without shearing off the stud. It has some sort of aluminum box ontop of this bracket with some sensor wires coming out of it, Slip the bracket off and simply lay it to the rear of the engine to provide better access to this last cylinder.

STEP 8.
Repeat steps 1-7 for plug #4 and then Remount bracket containing the aluminum box with sensor wires.

Upon completion of the passenger side,you now have to proceed to the driver side.
STEP 1. The first cylinder at the front of the engine the spark plug wire has a grey handle sticking up next to the A/C compressor. Using some pliers (needle nose plier) twist & pull this grey handle. The spark plug boot should pop out.

STEP 2.
With the help of the small flat edged screw driver, unhook the spark plug wire clips that hold the wires together. There are 3 - One just after the 1st coil pack located at the front of the engine, another just on the other side of the valve cover and a small 2 clip located about 1/2 way back on the valve cover under the intake manifold.
STEP 3.
Remove the spark plug wire from Cylinder #1 on the Drivers side
STEP 4.With the help of the small flat edged screw driver,press the 4 connection points on the grey handle that is attached to the wire,it will separate down the middle and allow you to remove the wire, Replace the wire with the new wire,you have to ensure you line up the rubber round plugs with the round holes in this grey handle & snap it back together with the new wire in place.

STEP 5.
Hold the spark plug socket in your left hand down near the plug,feed a 6" inch extension below the A/C Compressor line (black pipe) and the A/C Compressor with your right hand and attach the spark plug socket into the extension.
STEP 6.Slip the socket onto the plug,afterwards,attach an additional 3 or 6 inch extension to the existing extension & attach your socket wrench.
STEP 7.Remove the plug & proceed to replace it with a Bosch Platinum plug & anti-seize on the threads. Feed the new Spark Plug wire over to the 1st coil pack & replace it on the coil pack.

Jul 05, 2011 | 1997 Ford Ranger SuperCab

2 Answers

Mercedesw202 c200 pms ecu system . car wont start


Hi I have a 1995 C200 Auto Sedan chs WDB 2020202F241703, I think I have a problem in the ECU. Only runs on two cylinders, I have changed the core pack on the 1 & 4 cylinders but the problem persists. The other problem is I don't know where the ECU (engine computer ?) is can anyone help ?

May 17, 2010 | 1995 Mercedes-Benz C-Class

1 Answer

No spark


you may have to get the new engine harners wires and pcm form the 94 model, that will sove your problem

Apr 13, 2010 | 1994 Chevrolet Cavalier

1 Answer

Cant find the spark plugs for tune up maintennance


Does your car have a 1.5 liter or 1.8 liter engine? No matter. On the 1.5, it should have a distributor, (if I remember correctly) but the 1.8 has coil packs on top of the valve cover. 1.5 plugs will be at the front of the car, on the exhaust side, angled up. 1.8 plugs are under the 2 coil packs and wires accessed directly through the top of the valve cover. 1.8 wires should not be loose, (2 of them are part of the coil packs and bolt to the cover) but stuff happens. On either engine, grasp the boot and twist easily, gradually working the wire loose and off of the plug. Cheap wires always tear, so be careful. On the 1.8, 2 of the wires just come out when unbolt the coil packs with a 10 mm socket. Next you will need a good spark plug socket, (5/8 in, I think) a 3/8 ratchet, and perhaps a 10 in extension bar with a 3/8 square drive on the end. Take only the socket attached to the extension and put it on the plug, (1.8- put it in the valve cover hole with the aid of drop light) make sure it is securely on the plug, attach the ratchet, and remove the plug. Look at the electrode on the end (the part that goes inside the cylinder head) and see what color it is, what kind of crusty stuff is on it, or if it is damaged. Check the internet or a silly Haynes manual for determining what story the different plug conditions tell you. One color means lean, one means rich, etc... Loose connection would presumably set a MIL for a detected misfire. To install the new plugs, you first set the correct gap on the plugs. This info is on the nomenclature tag stuck to the inside of the hood on the passenger side. Most plugs (NGK, etc...) come pre-gapped, but always check this for yourself with a cheap gap tool from any auto parts store. Next, with your good plug socket, insert the plug into the socket making sure that the socket holds the plug securely, then work them in to plug hole by hand, taking care not to strip the threads. When you have the plugs tightened by hand as far as you can, you can then tighten them with a ratchet another 1/4 to 1/2 turn, or you can do it the official way: get a torque wrench and tighten them to the manufacturer's specifications. Next, put the wires on (this is so easy) and make sure if you have the distributor-equipped engine that you put the wires on the correct plug corresponding to the correct post on the distributor. 1.8 wires are easy and self-revealing: if you screw up wires on a 1.8, wait... how can you screw up wires on a 1.8 ?!? Anyway, there you go. Start it up and let it roll. Good luck

Dec 13, 2009 | 2000 Mitsubishi Mirage

1 Answer

I need a plug wire diagram for a 1995 Pontiac


Looking on your engine:
(Coil packs)
5-2 3-6 4-1
(Cylinders)
1 3 5
2 4 6
Your firing order (although irrelevant):
1-2-3-4-5-6

Sep 14, 2009 | 1995 Pontiac Grand Am

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