Question about 2001 Jaguar XJ8

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2001 Jaguar XJ8 Idles rough while sitting

When sitting at a stand still idles rough, Check Engine light is on with a code that says performance restricted.

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  • Anonymous Mar 24, 2014

    white smoke and restricted performance light came on

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O2 sensors often cause a rough idle at stand still. Previously my xj8 had crank case ventilation (pvc valve essentially) issues that caused the check engine w/ restricted performance. I noticed a severe drop in gas mileage as well. Jaguar dealer fixed my problems in a few hours and it was surprisingly cheap. Its worth taking it to advanced or auto zone to see what the computer says. Then decide if you want to shell out for a dealer fix or if you can tackle it yourself. BTW, just to justify myself this is my third jaguar. I have a '94 xj6 with a chevy 350 inside it, previously owned a 95 XJ6 and currently have the xj8. They are wonderful cars if you can put up with their rough times.

Posted on May 03, 2009

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