Many thanks for your response.
The interesting thing is that I forgot to mention was that trying to use an OBD reader to get codes out of the PCM/ECU yielded no results.
In fact the method of turning the ignition on/off 3 times quickly to get scan codes displayed on the dashboard doesn't work either.
I do know the fuel pump was replaced a little while ago and my jeep has only done 150,000 genuine Km's. I hope it hasn't gone again as it's a huge job.
Thanks again for your assistance
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