Reaching out for some help with 2010 XK 5.0 NA.
I’ve just completed fixing up my cooling system that was leaking in to the valley (if anyone wants more info, part numbers, failure points etc just let me know). Also changed plugs, oil, coolant and general fix and clean up.
So I’ve got her all ready to go but now she cranks but won’t start.
have got spark and I cracked off a fuel rail nut and fuel is under pressure.
Any tips on what to look for. Suspecting immobilizer or injector signal.
If I put the smart key in with the ignition off I get the message “check smart key”.
the red light on the dash is permanently during cranking.
Any pointer or suggestions please?

 

Welcome to the forums SiJevons,

You have the three essentials of rotation, fuel and spark so, in the absence of a con rod poking out of the side of the cylinder block, it can't be anything too serious.

1. go back over every harness connection that's been disconnected during the work and check for positive reconnection.
2. disconnecting electrical components or pulling fuses can cause the ECM to log DTC's (Diagnostic Trouble Codes). Getting a code reader on it could give useful troubleshooting possibilities.

Graham

 

Thanks for the welcome.

Finally got her going after finding a single bad wire inside a connector. It was in the worst possible place too, right in the back of the intake manifold.

It was a case of fix one problem and create another. Extremely frustrating!!!

 

And extremely gratifying when you found the cause and fixed it. Nothing beats the feeling of satisfaction for a job well done!