Question about 1999 Jaguar XK8

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JAG - 1999 XK8 - check engine light, reduced performance message and both yellow and red warning lights are on. What do you think the problem is?

I have a 1999 XK8 with 50000 miles. I restarted the car after driving it about 10 miles and the check engine light and reduced performance message came up with a yellow light. I drove it home and restarted the engine again and the same message appeared along with both a yellow and red light. I will need to take it into the Jag dealer - any idea what might be happening?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Flat battery

Get a set of jumper cables. Positive side of the battery goes to the + side or red. and negative goes to - or black. Do the same on the other car. let it charge for awhile before attempting to start

Posted on Feb 16, 2009

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  • 3 Answers

SOURCE: restricted performance under load

I had the same problem on my 1998 XJ8. My dealer told me it was the Mass Airflow Meter, which needed replacing to the tune of around $500. After a second opinion at my local Jag mechanic, it turned out to be a hose that was broken on the lower part of the front of the engine. Check the vacuum hoses for breaks or loose fittings.

Posted on Mar 16, 2009

  • 45 Answers

SOURCE: restricted performance under load

Some times, it only takes a good cleaning of the Mass Air Flow Meter to get it working again. Also clean out the full air intake and down the throttle body, especially the butterfly flap. There are special cleaners for both the Mass Air Flow Meter, and the Throttle Body. Be sure to use the correct ones as there are special coatings that can be damaged by the wrong cleaners.

Posted on Apr 01, 2009

bob6229
  • 3 Answers

SOURCE: my parking brake will not relase on a Jag xk8.

I worked in a Jag shop back in the '70's in Los Angeles, but I'm from New England, where this is a BIG problem, unless you use the parking brake ALL the time.  Actually this is true for all vehicles!
If the case is that you don't usually use the parking brake, and then you go to use it, it will sometimes lock on due to rust, corrosion and dirt in the cable.
SOMETIMES, if you are very lucky, you can drown the cable in WD-40, soaking it several times a day, from inside the car, and under the car as well, if you can get to it.
Each time you do this, hold the release button and work the lever over and over so that maybe it will release.
If this doesn't work, then you have to replace the cable.
Sorry that it's not an easy fix.  Ultimately you might have to have it towed to a dealer or shop to replace the cable.
Final thought...  sometimes the problem is with the levers on the brake assemblies, that can stick.  If you can get to them, give them a slight 'tap' with a hammer to see if they will suddenly snap open.  Make sure the brake lever is down and the button is held in by a helper.
If this is the case, a VERY light squirt of lube at the pivot points might keep it from sticking again, but be sure to use the parking brake often.
If the car is an automatic, the device that 'locks' the transmission when it's in 'Park' is called a parking pawl.  It is a small steel pin about 1/8" to 3/16" that gets shoved into a parking gear slot.  This is what keeps the car from rolling, so it's VERY important to use the parking brake to assist this, especially when someone bumps the car a little when they are parking their car!  Oh, and the parking pawl is most times the first thing into the tranny when assembling it, so it'a lot of work to replace one.
Good Luck.

Posted on May 02, 2009

Molson02536
  • 3854 Answers

SOURCE: no manual for 97 xk8 ... cannot get radio code..

Log on to www.radio-code.com They should be able to help you get the code and get your radio working again, but try 0000 for now and see if that works. Good luck and Keep me posted. Be glad to help

Posted on Jun 23, 2009

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