2000 xj8, changed valve cover gaskets, on trying to start car it ran for only a second or two, then showed red restricted performance. Checked cams and found the flats are alined perfectly, timing chain tension is good, checked cylinder compression and low (40psi) across all cylinders. checked spark plugs and getting good spark, restricted performance code won't clear, car has 80,000 miles , no heating problem and no signs of head gasket problems either, can hand crank and don't hear noise and cranks easily. Was told that could have had exhaust cam stuck, due to no oil. as had to leave cams exposed for several days while getting new valve cover gaskets due to wrong size on first order, Local mechanic wants to check timing, but don't know if worth the expense if this not problem. Crank sensor and cam sensors don't seem to be the problem, as am getting good gas and spark plug spark. What do I look for next? I'm out of ideas.

 

Welcome to the forum,

Good to have you with us.
Post your problem in the X308 tech section for a better response XJ ( X308 ) XJ8 / XJR - Jaguar Forums - Jaguar Enthusiasts Forum
My guess would be possibly bore wash, do a search foer that.

You should add your car details to your signature to help others to help you. When you get it.

 

Welcome to the forum,

Good advice from Norri.

Be sure to post full details of the reason for the teardown and all codes.

Remember to add vehicle details to your Signature to help others to give relevant advice. Go to the User ID button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

Graham