What kind of ignition system does Jaguar XJ-S use?

Three ingition systems have been used on the Jaguar XJ-S: the Lucas Opus Mark 2 system on non-H.E. engines prior to 1982; the Lucas ignition on H.E. engines 1982 to 1989; and finally the Marelli ignition on post-1989 cars. An ignition coil requires a certain amount of time to build up enough energy to produce a spark.

What to do if your Jaguar does not start?

Take your transmission shifter and put it in the “N” position from “P” and try to start the car. The shifter selector switch has been known to wear out or out of adjustment causing a no start situation. If the car does not start put it back in “P” and check the inertia switch.

How to check fuses on a jagrepair Jaguar?

1. Check that you have a fully charged battery and that you have power to all fuse panels. 2. Be sure that you have fuel pressure. 3. Check that you have spark. This all seems easy until you get involved in doing it. I will suggest to you to check fuses, fuel schrader valve and all sorts of things.

Which is the plug to use on a Jaguar?

A quick survey of a group of Jaguar experts clearly indicates that NGK is the plug to use. The study may have been unscientific and the reasons may have varied, but the consensus was clear and overwhelming. The H.E. engine uses taper seal plugs; the pre-H.E. engine uses washer-seal plugs.

How many fuel pumps does a Jaguar XJ8 have?

The XJ8 & XK8 has one fuel pump and the XJR & XKR have two fuel pumps, in either case they have fuses in the trunk. They also have relays related to each pump. If you think you have a bad relay you can swap that relay with a like relay. The theory is that the chances of having two bad relays at the same time is slim.

How do you fix a Jaguar h.e.engine?

Aaargh! The official Jaguar fix involves recessing, drilling and tapping the holes for larger threads, installing an insert, and installing a small pin to prevent the insert from unscrewing. Note that the inserts will be different for H.E. and pre-H.E. engines, since the pre-H.E. used washer seal plugs while the H.E. uses taper seal plugs.

What was the problem with the Jaguar vaccum system?

To be kind, the system was very innovative (and complex), but was also a source of enormous trouble, customer dissatisfaction, and heavy warranty costs for Jaguar in that period.

Is the Jaguar XJ40 3.6L a manual transmission?

Fits all 87-89 XJ40 3.6L models: LHD or RHD with automatic transmission (contact us for info on manual transmission installations) Retains the original Jaguar brake master cylinder (and it is not even required to disconnect it from the car for kit installation!!) Retains the original Jaguar ABS system (with full function)

What kind of engine does the Jaguar XJS have?

Not what Jaguar drivers were used to… Mechanically, the heart of the XJS was the V12 engine. Although not new after four years in the E-type and three in the XJ12 saloon, its turbine like smoothness and seemingly endless torque quickly became the XJS selling point.

What was the back self leveling system on a Jaguar?

Jaguar used a very unusual engine driven hydraulic system on these cars to power the brake servo/booster and to also power the rear self-leveling system. To be kind, the system was very innovative (and complex), but was also a source of enormous trouble, customer disatisfaction, and heavy warranty costs for Jaguar in that period.

What to do if your ignition system won’t start?

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How can I tell if my ignition spark is good?

Check that you have spark. First see if the fuses for the ignition coils are good. This can be done by pulling one of the coil packs and inserting a spark plug, grounding it and try to start the car. Another way is to use an ignition spark checker.

What to do if your Jaguar XJ6 won’t start?

If your XJ6 or XJ12 won’t start, grab your voltmeter and follow this checklist. Covers checking spark plugs, coil, wires and distributor cap, ballast resistor, amplifier and distributor pick-up, fuel supply, fuel pump and relay, air flow meter, fuel injectors and ECU.

What causes a jeep to have a no start condition?

The usual suspects, that can cause this type of problem, are a bad fuel pump, bad crank sensor, bad ignition coil (if your Jeep is distributor equipped), etc. Does Not Crank Condition: Means that the engine is not cranking when you turn the key to crank the engine.

What causes a car to have no spark?

In my experience, the most common component failures, of the ignition system that cause a no start-no spark Condition are: Failed ignition coil. Bad distributor cap (if distributor equipped). Bad distributor rotor (if distributor equipped).

What to do if your Jaguar has no spark?

If no spark, see step 3. If you DO have spark here then you have a faulty cap and/or rotor (spark is getting to the distributor cap but not getting to the sparkplugs). Remove the distributor cap and peek inside. Look for a burned center terminal, burned terminals to the plugs, cracks, or carbon tracks between the terminals.

Can a Jaguar ignition amplifier be replaced by Allison?

This amplifier was later redesigned by Jaguar with longer leads so the location could be moved off the engine, but these amplifiers continue to fail. After replacing the original and redesigned Jaguar amplifiers I decided that the permanent solution was to install an aftermarket unit manufactured by Allison.

What kind of engine does a Jaguar XJ6 have?

Models covered Jaguar XJ6 models with 3.2 litre (3239 cc), 3.6 litre (3590 cc) & 4.0 litre (3980 cc) six-cylinder in-line dohc petrol engines and automatic transmission

Where does the power come from on a Jaguar?

3) If you don’t have spark at the coil wire-to-distributor cap, then check for power getting to the ignition coil. Power here comes directly from the ignition switch via a white wire. If you have a ballast resistor, the wire will go there first.

What causes a car to stall with no spark?

Consequently, An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. The engine may suddenly just shut off, almost as if the key had been turned off. Depending on the nature of the issue, sometimes the vehicle can be restarted and driven.

Why is there no spark in my ignition?

An ignition module requires some type of external input in order to activate. If your vehicle stalls unexpectedly during operation and will not start again, it is likely because of loose or corroded electrical connections in the ignition module. In this case, check the switch, clean oxidized terminals, and replace broken wires if necessary.

What to do when your engine has no spark?

Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. Finally, Have someone crank the engine and watch for spark. Remove one of the coils from the spark plug. Use an extra spark plug. A spark plug tester. Or even a screwdriver in the end of the coil.

What to do if there is no spark at the ignition coil?

Check for voltage output at the ignition coil. Disconnect the ignition coil wire from the distributor and install the spark tester to the wire and ground the tester to the engine. Crank the engine for a few seconds. If there’s spark, the problem is with the distributor cap or rotor.

When to start troubleshooting on a Jaguar XJ?

If you have a ballast which checks good at both terminals but no voltage at the “+” coil post, then check for a wiring fault between the ballast and the coil. If you don’t have a ballast you should have voltage at the “+” coil post if your wiring is OK, as mentioned earlier.

Why is there no spark at the coil axle?

If there’s no voltage, check the wire between the ignition switch and the coil and, if necessary, the switch itself. If there’s voltage, the problem may be with the pickup unit. If the pickup is good, then the problem may be with the ignition control module.

What to do when your Jaguar says no start?

If it’s bad enough to create a “no start” you’ll see obvious burning and/or disintegration of the contact. 3) If you don’t have spark at the coil wire-to-distributor cap, then check for power getting to the ignition coil. Power here comes directly from the ignition switch via a white wire.

Why does my Jaguar XJ6 engine not start?

For a period of approximately a month, the engine became harder and harder to start, until one day, it wouldnt start at all. The engine would crank and eventually start at time though.

Can you replace the wiring on a Jaguar XJ6?

Incidentally, JagBits has a very nice article written about replacing XJ12 wiring that is also relative to other cars. Pictures too! As it turned out, once the pitiful cloth insulation was removed, many wires leading to the coil where cracked, with some hanging on by a few wire strands underneath.

Why does my XJS ignition system not work?

It might also struggle around the peak torque point. Although the V12 constant energy ignition module is fairly tolerant (it runs OK with the blanked second coil removed – albeit with a loss of spark energy) the ignition system will behave oddly if the coil is not the correct load match.

For a period of approximately a month, the engine became harder and harder to start, until one day, it wouldnt start at all. The engine would crank and eventually start at time though.

When did the XJ ignition system go to Marelli?

If either coil goes bad, the performance will suffer. Since mid-1989, XJ-S’s have gone to a Marelli ignition system that also uses two coils. However, these two coils are totally separate; each one fires only six cylinders. HE MAIN COIL REPLACEMENT

What should the gap be on a Marelli ignition plug?

Prior to the actual spark, there is no current flow so the resistance has no effect on the voltage available at the electrodes. Note that the pre-Marelli ignition H.E. engine generally calls for a 0.025″ gap (check decal on underside of hood). Plugs come out of the box with a 0.032″-0.035″ gap. The gaps need to be adjusted prior to installation.

Who was the designer of the Jaguar XJS?

1980 saw the arrival of John Egan at the helm of Jaguar facing a critical situation after years of slumping sales and declining quality during the dark British Leyland years. Egan saw the XJS potential and commissioned work by an independent Swiss engineer, Michael May, who designed a new revolutionary head for the thirsty V12.

When did the JAG XJS go out of production?

In 1980, a new Bosch/Lucas digital electronic injection system brought in a little more power but caused fuel economy, or lack of, to get even worst dipping into single digits under spirited driving conditions. Despite being the only V12 engined car available on the US market, lack of demand brought the XJS to the verge of extinction.

What kind of engine does a 1991 Jaguar XJS have?

I6 or V12 power were your options in the XJS lineup, and most folks seemed to have chosen the 12-cylinder model. This being a 1991 car means it received a few other enhancements, such as smoother bumpers that distilled the visual disruption caused by large safety bumpers.

Where was the 1989 Jaguar XJS Rouge Collection sold?

This 1989 Jaguar XJS was sold at Mark Jaguar of Denver, Colorado in November 1989 and remained in Colorado until 2014. The car is one of approximately 99 Rouge Collection examples produced for the 1989-1990 model year, and is finished in Signal Red over Magnolia leather with red piping.

What kind of engine does a Jaguar Rouge Collection have?

The car is one of approximately 99 Rouge Collection examples produced for the 1989-1990 model year, and is finished in Signal Red over Magnolia leather with red piping. Power comes from a 5.3 liter V-12 paired with a 3-speed automatic transmission, and recent work included an oil/filter change, new Cooper Cobra tires, and air conditioning service.

What kind of spark plug does a Jaguar XJ6 use?

Spark plugs are an easy do-it-yourself project on an XJ6 but can be a bit tricky on an XJ12. See the Jaguar Forums to learn about changing V12 spark plugs. Six cylinder spark plugs are easily accessible. Most Jag owners prefer the orignal Champion spark plugs. Other types are acceptable and some owners like platinum plugs.

What kind of ground distributor does a Jaguar XKE use?

Fits Jaguar XKE V12, XJ12 and XJS V12 with Lucas 36DE12 Negative Ground Distributors. Replaces the pickup unit in original Lucas 36DE12 Electronic Distributors.

Can you fit a pertronix ignitor in a XKE V12?

Due to the compact size and the absence of an external amplifier its nearly undetectable while it fits entirely under your distributor cap. Please note: Fitting this kit to an XKE V12, E-type Series 3 its necessary to install a 9 to 10K ohm resistor in between the tachometer trigger wire to prevent the tach from reading double.

When to change spark plugs on a Jaguar?

Black, fluffy plugs indicate a mixture problem (too rich) as do near-white plugs (too lean). Black, oily plugs indicate oil in the combustion chambers, from worn rings and such. The distributor cap and rotor should also be changed every 30,000 miles or whenever the contacts show obvious corrosion or burning. Inspect them every 12,000 miles.

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