2001 xk8 convertible cranks over will not start. Has no spark at coils or fuel injector pulse. 41 psi at fuel rail cranks over has new battery and with charger on reads over 13 volts when cranking. has pulse at cam sensors replaced crank sensor replaced ecm. has one 12 volts at coil the three other wires nothing when cranking. Battery has gone dead a few times and would not start it has always turned over in park or neutral shifter indicator lights up key fob works all windows work horn works top works radio works. tried battery disconnect and also pos and neg touch together still no start. I was at the store and went to start just clicked and found loose battery cable tightened cable turns over but still no spark at coils or pulse at injectors can hear fuel pump running tested all relays and jumped them still no spark checked all fuses good fuel shut off switch down . Did try a key sequence at door lock then put in ignition then started but lost thread. Any thoughts

 

Always begin diagnosis with a strong, fully charged battery.

What is the battery voltage across the terminals with the ignition in the OFF position when checked with a voltmeter? If the voltage displayed on the voltmeter is less than 12.6 volts, charge the battery for six hours at 2 to 5 amps, then retest. If the voltmeter still shows less than 12.6 volts, the battery should be replaced. The X100 requires 12.6 volts for all systems to function normally.

 

do you know which wires are ground in coil and injector circuits

 

Is the MIL on? If so, post the DTCs. Guessing on a Jaguar can become very expensive quite fast.

Check the CPK as that can cause the condition you describe.