Top 20 2004 Jaguar XK8 Questions & Answers

check the brake light switch

Hello That usually happens when you have a loose regulator , which in effect would not set the window properly. The regulator has to be in good condition for the setting to stay as it should be,

Try going through the set up of your key fobs like you replaced them and see if that works.

to latch manually you have a allen key located on the pump in the boot rh side, remove the little plug on the screen closing panel and use the key to latch the mechanism. if the roof top operation is poor/ sluggish it needs the roof/top hydraulic system flushing and new pentosyl fluid using in the system the old type/origional fluid can turn to a jelly like substance.

4.0L And 4.2L Engines

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove or disconnect the following:
   NOTE Cap the power steering line to prevent loss of fluid and dirt ingress.
   
   NOTE Drain the fluid into a suitable container.
   
   
   Left-hand front wheel and tire. Air deflector. Left-hand engine mount retaining nut. Splash shield
   
   
   Power steering reservoir to power steering pump supply line Air conditioning (A/C) compressor upper retaining bolts
   
3. Vehicles without supercharger, remove the throttle body.
4. Vehicles with supercharger, remove the air cleaner outlet pipe.
5. Install the left-hand engine lifting eye 303-749.
6. Using the special tools 303-021 and 303-749, raise the engine to a suitable height.
7. Raise and support the vehicle.
8. Remove or disconnect the following:
   
9. A/C compressor lower retaining bolt. Power steering pump lower retaining bolts. Lower the vehicle. Accessory drive belt. Power steering pump to steering gear pressure line. Remove and discard the O-ring seal. Wiring harness retaining clip from the power steering pump. Brake pipe retaining clamps. To install:
   
   1. Using the special tool 211-D027, install a new union O-ring seal. Push the new O-ring seal onto the special tool. Locate the tool over the union and ease the O-ring seal onto the union.
   2. To complete installation, reverse remaining removal procedure.
   3. Bleed the power steering system. AUTOZONE MAY HAVE THESE SPECIAL TOOLS THAT THEY LOAN OUT,CALL AND ASK. Bleeding

      Print
      When filling the reservoir, make sure that the fluid is clean and not agitated prior to use. The fluid should be poured slowly into the reservoir to minimize the possibility of aeration.
      

      1. Fill the reservoir to the MAX mark.
         NOTE Do not start the engine.
         
      2. Turn the steering from lock to lock.
      3. Check the fluid level. Fill the reservoir to the MAX mark if necessary.
      4. Start the engine and turn the steering from lock to lock.
      5. Switch the engine off.
      6. Check the fluid level. Fill the reservoir to the MAX mark if necessary.
      7. Start the engine, turn the steering wheel from lock to lock. If excessive noise is apparent or shudder is evident through the steering wheel, repeat the bleed procedure.
   Power steering pump
   

The easiest and cheapest way is to go to a shop wherethey use scopemeter testing.

The DIYer's way is to get the shop manual buy a spark tester and do exactly what the manual and the testers manual tell you to do to measure for spark.

Another DIYer's way is to buy a coil pack and swap it out for a bad one and then test for spark.

Not likely that all coils went. Ignition module is a common for all coils and so is battery and ignition switch.let me know how you make out.

You will probably have to take it to a Jaguar dealer and have them change the code for you.

A wild guess - your crank speed sensor. But, with this level of malfunction, pull the codes. Buy a code reader (EOBD/OBD) from Ebay or go to a Jaguar dealer or any decent engine diagnostic center and they will tell you what is malfunctioning. The codes don't tell all the story, they just tell you what is out of tolerance - there could be a lot of things out just because one component is malfunctioning, so you need someone who has expertise with this engine.

you should have trunk key all cars trunk can be open remote by the inside. if any fails you always have a trunk key. check your ignition key .i seen ignition keys do both. it cranks car and open doors and trunk.

Hmm, you may need to get the dealer to adjust the cables. Also make sure the pump has fluid (right side trunk, behind the cover). Once the top comes down to the top of the window, you can see the device that should pull it down tight. In an emergency, there is a hex key in the right side of the trunk that you can use to manually bring that down tight. Your vehicle manual explains how to do this emergency operation.

?? I also have 2004 XK8 with the navigation screen (Alpine). That isn't a touch type screen. The newer ones have a touch screen, but not that year.
You set the temperature (digital display) and the car will either turn on the heat or air conditioning, and speed up or slow down the fan depending on how close the actual temperature is to what you have set.

Yes.  I solved my problem.   I'll tell you how I did it for $10.
I thought that your site was a chat room between owners of these cars and shared information for free.  d

it sounds like the lift mechanism/regulator has worn out or siezed and needs replacing

Take a look at this video:

Having a restoration shop and running several newer Jaguars I have seen similar situations. Intermittent multiple errors such as these can be caused by a low battery (or corroded connections) that "fool the computers". Also had a '99 XJ8 VDP have exactly the same issues over several months. Issue was a manufacturing fault in the sensors on the throttle body that caused the "limp home" mode - usually in stop and go traffic. Jaguar had an inspection and recall on the throttle bodies but that vehicle had gone through 3 different Jaguar dealers for service and none looked at TSB/Recall or performed the necessary checks on the throttle body. Tried cleaning the throttle several times (per Jaguar TSBs) but no change. Had to replace throttle body & problem solved (over 30,000 miles since then). Recommend making sure all air connections to throttle are clean and open and cleaning the throttle area to see if that helps. On newer Jaguars (and other Al bodied cars) similar problems occur when the "ground" connections to the body become poor (usually through corrosion but sometimes through collisions). Connections may look perfectly normal but have high resistance. Careful when working with the connections - the posts are usually very loosely fastened to the bodies. Good luck.

you may try adding a engine oil flush follow the instructions on the container if the lifter is blocked that may help but that engine at that model/year suffered with worn nicosyl coated liners which made the engine poor starting/noisy unless it has been reworked with cast liners

the electronic part of the unit ie. module is seperate from the pump unit and can be interchanged someone may have put a module from a different unit on to your pump motor unit ie, from a xkr which as a differant connector

Is it the PSI specs good {30PSI?} If not u have to start w checking 4 vacuum leaks, oxygen sensors, get emissions test to get all other emissions read (HC, NOX, CO) All the readings will give the tech a path. U have to have the right amt of fuel going into the pump & regulator to get the right PSI too. Clogged exhaust? The possibilities go on. Good Luck

Could at either plug(corrosion) Most wires break close to the plug, Check voltage a couple inches back. Unplug it(if you haven't already) check it. If you have voltage at the brake switch and a couple inches back(probe the wire) nothing at the Shifter solenoid. I would run a new wire to it. Way easier than removing the console and dash to find the short. If you have other problem, I would be looking at the fuse panel .

Possible bad wire in motor so it opens up and stops motor after heating.