2000 Jaguar XJ8 • V8 2WD • 234,000 miles

I have a 2000 xj8. It turns over fast when cranking but wont start. Restricted performance light was on and I was on my way to the shop and car just died. Any ideas or tests I can try on my own rather than paying $110 per hr?
July 30, 2011.

Do below to determine if its fuel or spark problem-

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing

Jul 30, 2011.
I have spark and feul. Took valve covers off and checked timing chain and tensioners and all seems good, chans are tight.

Jul 30, 2011.