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.

What kind of transmission does a Jaguar XJ6 have?

Jaguar XJ6 Service and Repair Manual 3261 Jaguar XJ6 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

How do you stop a Jaguar XJ6 Series III?

Very carefully, with a sharp, straight edged razor, I cut away the brittle, now hard as plastic, rubber boot that protected the top of the connector. There are two wires leading into this connector. After carefully removing the spring retaining clip, I lifted the connector slowly, causing the engine to cease.

Where can I get a new Jaguar XJ6?

Its no wonder we see so many excellent condition XJ6s sitting and rotting away in Jaguar Heaven (a Jaguar Wrecking and Parts yard in Stockton, CA). Even a local Jaguar mechanic confirmed this, by saying the dealer does not charge flat rates on these models anymore.

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.

Where can I find a Jaguar XJ6 Series III?

In some cases, we find, we are becoming the local Jag experts unwillingly on some things. Its no wonder we see so many excellent condition XJ6s sitting and rotting away in Jaguar Heaven (a Jaguar Wrecking and Parts yard in Stockton, CA).

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 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

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.

How can I tell if my Jaguar XJ6 is immobilised?

To find out if a car is immobilised, perform this check. Turn ignition on but do not crank the engine. Observe the orange ‘check engine’ light in the bottom left corner of the instrument pod. If that light goes out, the car is immobilsed, at least by the starter not cranking the engine if you try to start it.

Where is the Check Engine light on a Jaguar XJ6?

Observe the orange ‘check engine’ light in the bottom left corner of the instrument pod. If that light goes out, the car is immobilsed, at least by the starter not cranking the engine if you try to start it. The fact that other systems like wipers, lights, windows etc. will still work can confuse the issue.

What do you need to start a Jaguar XJ6 Series III?

Cut it to length and provide your friends with replacement pieces from whats left! Also, Harley Davidson Motorcycles has a great 1.5 long rubber isolator for $2 apiece where Jaguars part is $12-14 each. You will need to purchase spacer washers, lock washers and nuts for each (18 of each total).

Why does my Jaguar XJ6 not start up?

About half of the time, the reason why the Jaguar XJ6 will not start or quits running is because of the two main electrical problems that I described above. The other cause of the XJ6 not starting or quits running is the fuel system. Mostly, it is the fuel pump being killed by rust flakes from the two fuel tanks.

When did the Jaguar XJ6 start and run?

I now want to tell everyone how to make the Jaguar XJ6 manufactured from the early 1970s through the early 1980s start and run. I had previously not wanted to tell very many people, so that the price of these cars would continue to stay very low, and I would be able to buy many more of them, hoard them for myself, and save them.

How to check engine temp on Jaguar X350?

TonyXJR bought a thermostat kit and changed it quite successfully. Also 57jam89 in the S Type forum describes a process for checking engine temp using the button on the indicator stalk, i’m going to see if that works on the X350. After i’ve checked I have a button on my indicator stalk!!!!!

Why is the fan running in my Jaguar?

Lift off the engine cover & touch one of the charge coolers, it should be noticeably cooler than the alloy intake tube that runs between the charge coolers, if it’s the same temp or warmer then i’d be looking at the intercooler coolant circuit and the electric pump. But the thermostat should also be on the list.

Is there an electrical system for a Jaguar XJ?

Available for most classic Jags, with XJ and XJ-S available soon. The diagrams are laminated in plastic and color coded to match the actual wiring. The supplier is:

Where is the aircon cooling fan on a Jaguar XJ6?

Aircon Cooling Fan XJ6 Schematic Horn Schematic Thermo Switch in RH lwr side of Radiator Red Relay LH of Rad 86 87a 87 85 30/51 N/G G/U Orange wire shows the modification to make the fan run whenever the AirCon Compressor is running To engine Loom connector RHS lower wing valance IN4001 Diode 10 Transducer 10:30

Where are the wires on a Jaguar XJ6?

Shorted or broken wires on this loom is not uncommon, as the locations of these few wires are located under the water manifold and right next to the engine. This is obviously a place where engine heat is trapped and can run very high.

These models are equipped with dual overhead cam in-line six- cylinder engines. The engines feature a computer-controlled ignition system and electronic fuel injection. Transmissions are a four-speed automatic equipped with a lock-up torque converter.

Do you need a stud for a Jaguar XJ6?

Also, Harley Davidson Motorcycles has a great 1.5 long rubber isolator for $2 apiece where Jaguars part is $12-14 each. You will need to purchase spacer washers, lock washers and nuts for each (18 of each total). The stud is vulcanized into the rubber, so no stud is necessary.

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.

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.

Where is the overflow tank cap on a Jaguar XJ6?

For a Series III XJ6, replace the header tank cap with a flat non-venting cap and the overflow tank cap with a 15 lb pressure cap (The header tank is located on the front of the coolent rail on the top, intake side of the engine, the overflow tank is on the fender wall).

Is there extra fuel in a Jaguar XJ6?

There is no provision for extra fuel at idle, the airflow meter adjustment meeting this need, and the only reason for detecting closed throttle is to activate over-run cut off via a micro-switch so this switch is omitted on cars with manual transmission.

How to adjust idle speed on Jaguar XJ6 SIII?

Everyone who tried to adjust the idle speed on a XJ6 SIII knows that it’s rather difficult to get at the adjuster screw because the air flow meter is in the way. If you take the air flow meter out, you can reach the adjuster but the engine doesn’t run, so no idle adjustment can be carried out.

The local mechanic Donnie Taylor, had done several engine swaps, where he replaced the Jaguar engine with either a Chevrolet Monte Carlo engine, or a Corvette engine. My father told the mechanic Donnie Taylor, to look for a good used Jaguar XJ6 for sale, to go and perform an inspection, and to bring it back if it was a good car.

Is the Jaguar XJ6 Series III a no start car?

I am not a Jaguar mechanic. I own two XJ6’s a black ’81, which I drive everyday, and a black ’83 that I intend to restore. So not being a comprehensive Jaguar mechanic, I was baffled as to the cause of a deteriorating no-start problem.

Why is my Jaguar not running on Def?

Follow the on-screen messages; your Jaguar will not run when the DEF reservoir has run dry. The lamp also illuminates if the incorrect fluid has been added to the system, or if there is a fault with the system. Stop as soon as you can and contact roadside assistance or a Jaguardealer. Engine Temperature

What kind of engine does the Jaguar XJ6 have?

This information pertains to the Jaguar XJ6 Series II-III models with the fuel injected 4.2 engine. However, in a broader sense, many of the items mentioned apply to other fuel injected models as well.

How to diagnose rich running on Jaguar XJ6?

Diagnosing rich running on the fuel injected 4.2L engine, covers checking of the coolant temperature sensor, fuel pressure regulator, oxygen sensor, fuel injectors, cold start circuit, fuel changeover system, air flow meter (AFM), and ECU. This information pertains to the Jaguar XJ6 Series II-III models with the fuel injected 4.2 engine.

Why are Jaguar XJ6 and XJ12 not worth more?

The V-12 is more difficult to maintain, and overheating issues were exacerbated by catalytic converters raising under-hood temperatures to crematorium levels. Rubber fuel hoses in the V never stood a chance. Ray Nierlich is a lifetime Jaguar expert, and has been Dr. Jaguar in Newport Beach for 25 years.

Where are the AJ6 fault codes on a XJ-S?

On saloons it has a red connector on the end of a K/R wire under the glove box trim panel on the passenger side. On XJ-S it has a purple connector on a Y/G wire behind the centre console panel in passenger footwell. Grounding the wire for 3 seconds clears one code number at a time in order of priority.

What kind of fault does a Jaguar X-type have?

Jaguar X-Type ABS Pump Fault. Very common problem, causes the ABS light to illuminate on the dash and fault codes for pump motor and/or wheel speed sensors. Jaguar S-Type Climate controller Air-conditioning. This is a very common fault for the Jaguar S-type, causing the heater to blow hot all of the time.

What was original resistance of Jaguar XJ6 engine?

The original sensor tested OK – with resistance of 1,250 ohms and inductance of 1 henry. However the replacement sensor seemed to cure the problem – almost! The engine would now rev to 3,000rpm – more than enough power to drive around. But it wasn’t right and still misfired.

What are the fault codes for the AJ6 engine?

Fault codes and related functions are listed below. 15CU Fault Codes and Functions – 3.2 and 4 litre AJ6 Engine Idle pot. Looks for more than 4 volts on trim pot wire. Defaults to 2.5 volts. Air flow meter. Looks for air flow meter signal less than 0.2 or more than 4.5 volts between 400 and 300 r.p.m. Coolant thermistor.

Why is my JAG engine not cranking up?

This environment is tough on terminals and dirty, loose connections here are a common cause of “no crank” conditions. As long as the car is lifted you may as well get under the alternator and remove the wires and do the clean and tighten routine there as well. Loose, dirty connections here are a common cause of battery run- down.

How to check your Jaguar engine will not crank?

Here’s how to check the circuit. Using the test light or multi meter, make the following voltage checks at the relay: brown wire at terminal C2 should have 12 volts at all times. If not, check for a wiring/connector fault between the relay and the right side firewall post.

What to do if your JAG starter wont crank?

It has no direct bearing on starter operation. 7) If all these voltage checks are OK then you likely have a faulty starter relay. You can opt to replace it or, if desired, disassemble it and clean the contacts. Many Jag owners have been sucessful in resurecting a dead relay with a good cleaning.

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.

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

What causes the fuel injector to go off?

This happens due to inadequate supply of fuel into the engine and you will notice the car’s revolution per minute (RMP) will fall below the best level when it is idling. This, in turn, causes the car to do convulsive or rough idling. And the engine could go off if the RMP falls more than necessary.

Where is the transmission on a Jaguar XJ6?

Transmissions are a four-speed automatic equipped with a lock-up torque converter. The transmission is mounted to the back of the engine, and power is transmitted to the fully independent rear axle through a two-piece propshaft.

How to change fuel injector on XJ 99-01?

For 99-01’s.use the screwdriver to pop the red lock tab up and then pull the connector off the injector. This is pretty much what you should be seeing at this point: 10. Remove the 2 bolts holding the fuel rail on. Gently pull the fuel rail away from the engine.

How does the fuel injector help the engine?

It supplies the engine with fuel to assist the internal combusting process. It has nozzles which spray fuel into the engine’s cylinder. Also, the vehicles Engine Control Unit (ECU) watches over the injectors functions and makes sure the exact quantity of fuel gets to the engine on time.

Why does my car stall with no fuel injector?

Most of these problems occur due to inadequate air to fuel ratio. Also, any delay could lead to overheating and the engine could stall. This happens due to inadequate supply of fuel into the engine and you will notice the car’s revolution per minute (RMP) will fall below the best level when it is idling.

Where is the fuse for the fuel injector located?

Blown injector circuit fuse Bad fuel injector power relay A fault in the wiring harness to the injectors So, the injector fuse and relay are usually located; in the relay box or power distribution center in the engine compartment. Fuses are used to protect various electrical circuits, while supplying power to components.

Where is the cold start injector on a Jaguar XJ6?

Check the throttle switch. Because the micro-switch is quite audible it is simple to adjust so that the “click” occurs as the throttle just begins to open, however, these switches do sometimes fall apart. The cold start injector only fires briefly during cranking to aid initial fire up.

What should the idle mixture be on a Jaguar XJ6?

Idle mixture on European cars is specified as giving 1-2 % CO but these elderly engines seem rather happier at 2-3 %. A wandering idle speed may be due to the over-run valve leaking as the spring sags with age. Raising the spring tension by a couple of turns on its screw will usually effect a cure.

What causes rich fuel mixture on EFI XJ6?

The coolant temp sensor is a common culprit. The main purpose of this sensor is to “tell” the ECU that the engine is cold so that a richer mixture, required with a cold motor, will be provided. In this sense it is similar in intent to an automatic choke on a carbureted engine.

Why does my car not start when I Turn on the ignition?

The most common causes are in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter). However, the source may also be a mechanical fault (for example, a leaking valve), or faulty components in other systems.

What should I do if my engine won’t start?

You should see a bright spark jumping the gap in the spark tester. If you don’t see a spark, repeat the test. This time, adjust the spark tester to 30KV. If you still don’t see a spark, repeat the test and set the tester to 10KV. If this time you see a spark or no spark, you have a problem with the ignition system.

How does the fuel system work on a Jaguar XJ12?

The fuel system is quite remarkable too; on the XJ-S there is a fuel pump in the boot sitting in its own little tank, fed by gravity from the main tank. On XJ12 there are two main fuel tanks which both feed the fuel pump in the boot but with fuel solenoids to select which tank is used.

Why did the Jaguar V12 have hot re-start problems?

Early systems suffered from hot re-start problems due to having very small bore fuel rails which are prone to fuel vaporisation in the heat, the later larger bore system is a useful upgrade.

What causes a Jaguar XJ engine to stall?

In November 1994, Jaguar issued technical bulletin 44-23for Jaguar XJS vehicles with 4.0-litre AJ16 engines. In these vehicles, the engine may stall when the transmission is shifted to Reverse or Drive from Park; stalling was most likely to occur when the engine was cold.

When did the spark plug change on the Jaguar XJS?

Jaguar XJS AJ16: spark plug specification change In May 1995, Jaguar issued technical bulletin 12-54for 1995 model year Jaguar XJS vehicles with naturally aspirated 4.0-litre AJ16 engines. In these vehicles, hotter spark plugs were installed in production from VIN 194775. Jaguar XJS V12: rough idle/engine misfire

What is the problem code on a Jaguar XJS?

In these vehicles, the ‘check engine’ malfunction indicator light may illuminate and diagnostic trouble codes (DTCs) FF44 and/or FF45 may be stored. According to the technical bulletin, these DTCs show an inconsistent reading from the heated oxygen sensors (HO2S) due to a slight degradation of the engine to body ground straps.

What kind of engine does a Jaguar XJS have?

In August 1997, Jaguar issued an amended technical bulletin 17-9 for 1993-94 model year Jaguar XJS vehicles with 4.0-litre petrol engines. In these vehicles, the operation of the AIR pump clutch was controlled by a relay located in the engine compartment.

Which is standard equipment on a Jaguar XJ6?

Power-assisted Anti-lock Brake Systems (ABS) with four-wheel disc brakes are standard equipment on all Jaguar XJ6 models covered in this manual. Power rack-and-pinion steering is also standard equipment. Your Jaguar manual The aim of this manual is to help you get the best value from your vehicle. It can do so in several ways.

Can a Jaguar XJ12 be replaced under the bonnet?

The Brits (still trying to get back at us for the Revolution), are very poor with their wire insulation and even worse at their artistic endeavor to provide a clean under-bonnet wiringat least in this vintage Jaguar. Incidentally, JagBits has a very nice article written about replacing XJ12 wiring that is also relative to other cars.

Where is the neutral safety switch on a Jaguar XJ6?

Two connectors go into the Park lock switch above the gear sift nob and down to the transmission. I assume that one is for the speedometer, the other seems to connect to the side of the transmission where I would expect a neutral safety switch to be??

Where are the fuses on a Jaguar XJ6?

If your car’s accessories are shutting off on their own inspect the car’s fuses and replace blown ones. Replacing a fuse is much cheaper than paying for new equipment or repairs that you don’t need so take a few minutes to find your fuse boxes. Your owner’s manual can help you locate them. Jaguar XJ6 Series 3 1. Glass fuse https://amzn.to/2GeEANS

What happens when you turn off the air conditioning in a Jaguar?

When you turn off the system, the A/C compressor clutch disengages, and no longer causes a drag on the engine. REFRIGERANT – A little physics if you don’t mind: There’s no such thing as “cold” – there’s only a lack of heat.

What kind of air conditioning does a Jaguar XJ have?

Power-assisted steering and leather upholstery were standard on the 2.8 L De Luxe and 4.2 L models and air conditioning was offered as an optional extra on the 4.2 L Daimler versions which were launched in October 1969, in a series of television advertisements featuring Sir William.

How can I tell if my idle control valve is working?

To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

Where is the speed adjustment on a Jaguar?

It’s an aluminum casting with some hoses going hither and thither. The adjustment is made by turning the allen-head screw (5/16″ ?)which is located in the upper area of the block and a bit tricky to access (doesn’t matter if you’re blind or not—-it’s mostly done by feel).

Why is my remote start not working on my Jaguar?

Sounds like maybe something is glitching in either the telematics or your Jaguar in control remote account which is a different account than route planner. Are you able to get into your incontrol.jaguar.com account through web on a computer- not your phone? Two apps use different telecom systems in car. Route app uses your 3G/SIM connection.

What should I know about a Jaguar XJ8?

Many (1997-2000) Jaguar XJ8s have engines that can fail when exposed to high sulphur fuel. Nikasil is a metal coating that some manufacturers used to line the inside of their engine cylinders….notably BMW and Jaguar. In theory nikasil is great. It’s lightweight, offers lower friction, and is generally hard wearing.

What do you need to troubleshoot a Jaguar?

You will need basic hand tools, a 12-volt test light or voltmeter, and a jumper wire with alligator clips. I believe this info to be accurate for all 4.2 Series III cars, but the very earliest models have a combination relay instead of the separate pump relay, main relay, and diode pack.

What do you need to know about starting a Jaguar?

The first thing you need to do is be sure that you have what is necessary for the car to start. 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.

What did the Jaguar XJ6 get in 1990?

The Sovereign sedan gained fog lights, while the Vanden Plas got new alloy wheels and a “fluted” grille. Changes were minimal for ’92. Once again, base XJ6, Sovereign, and Vanden Plas sedans went on sale, along with a temporarily revived Vanden Plas Majestic sedan.

How many horsepower does a Jaguar XJ6 have?

Engines Engine Size (liters/cubic inches) Engine Size (liters/cubic inches) 4.0/243 Engine HP Engine HP 223 Engine Torque (lb-ft) Engine Torque (lb-ft) 278 Avail. Trans. EPA MPG (city/hwy) MPG avg. as tested

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 does my car engine not want to start?

If the engine still doesn’t seem like it wants to start, probably fuel is getting into the cylinders and your problems lies somewhere else. However, if the engine runs momentarily and dies, then the problem is that fuel is not getting to the cylinders. Check for a clogged fuel filter, or a bad fuel pressure regulator.

Where is the fuel pump on a 1978 Jaguar XJ6?

On the 1978 XJ6 there is one fuel pump in the bottom of the trunk, on earlier versions, there used to be two fuel pumps, one for each tank. There is a switch on the dashboard, where you select which tank you want to pump from, the left tank, or the right tank.

Why does a Jaguar engine stop when Def runs out?

Jaguar’s latest diesel models produce exceptionally low exhaust emissions as a result of Diesel Exhaust Fluid (DEF), which is injected into the exhaust gases. If the DEF reservoir runs out completely, the car will stop rather than risk damaging the engine.

Why is the Def warning light not working on my Jaguar?

If the Diesel Exhaust Fluid (DEF) warning lamp illuminates, the level of DEF is seriously low. Follow the on-screen messages; your Jaguar will not run when the DEF reservoir has run dry. The lamp also illuminates if the incorrect fluid has been added to the system, or if there is a fault with the system.

https://www.youtube.com/watch?v=_JXHgWumzvw

When to reset the clock on a Jaguar?

Refer to the audio systems handbook or touch-screen display handbook. • If the battery is disconnected for more than 72 hours the radio preset channels will need to be reset. • Reset the clock to the correct time.

What happens when you disconnect the battery on a Jaguar?

When the battery is disconnected, these adaptations are lost. On reconnection, therefore, some slightly abnormal drive symptoms may occur and the vehicle may need to be driven10 miles (16 kilometres) or more while the control system re-adapts. this is a simple link for resets after battery disconnect.

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