barrie loveday (77.103.33.116) - Sun Apr 19 09:44:46 2009

not had xk long went for drive had lack of power and restricted performance cam up. Stopped for a short time and then drove off no further problem so far. What's up?

Reply #1 barrie loveday (77.103.33.116) - Sun Apr 19 09:55:02 2009

not had xk long went for a drive had loss of power and RESTRICTED PERFORMANCE came up. turned engine of restarted and had no further problem so far. What;s up?

Reply #2 Michael (99.20.233.116) - Fri Apr 24 19:05:14 2009

I had similar troubles and now seem to have corrected it -turned out to be misfires on one cylinders (one then another failed a month later) due to worn Coil-on-plug modules. Rather easy for owner to replace with a few metric sockets, and a flat screwdriver. You will need to connect an OBDII scanner tool to the connected to the connector(drivers side just inside the driver's door edge). These can be found for under $70. Read the codes. If it is a misfire there will be many codes-don't have a heartattack. The engine controller will shut down the oxygen sensor, oxygen sensor heater, and other things when there is a misfire - and all those codes will appear along with the misfire code. The code will tell you which cylinder is misfiring (like P0305 is cylinder #5 - the front plug on driver's side). If your mileage is above 60k miles you probably will find it convenient to replace the plugs too as you will have the plugs exposed during replacment of the Coil unit. The coil-on-plug unit sells for about $110 on-line. Get the Jaguar Repair CD - also about $25 - which gives all the bolt torque specs and sketches of step-by-step repairs. Best regards - Michael

Reply #3 barrie loveday (77.103.33.116) - Thu May 7 13:56:11 2009

Hi michael thanks for you reply to RESTRICTED PERFORMANCE fault. 24th April

The fault has not come back and jag say it's was probably something to do with the cat.

On reflection I think I could have kicked the gas peddle down too early when the engine was cold. But thats a layman's view.

Sorry for long delay in response I am new to the web and new to this new mac!

Today I have got another problem the seat belt warning light won't go out whe the belt is connected.

any ideas?

don't know if I can get a Jag repair CD i am in UK I will look on net.

Thanks again for your time

Reply #4 cody (207.235.248.10) - Tue Nov 10 11:24:33 2009

My 2000 xj is saying restricted performence too, i replaced the plugs on it, still no change. How do you know which coil is cylinder number one?

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