[clandyuk]

Hi everyone, my ancient 940 2.3 LPT (97 MY) has been sitting idle for these past month(s).
Started it yesterday and whilst it started on the button, it's only running on 3 cylinders! Natch, it was running fine before lockdown.
Pulled leads and it's #1 that's doing nothing.
Checked for spark - yes, good spark.
I pulled the injector plugs on #1 and #2 and tested for voltage on the 2 pins with ignition on. #1 showing 11.98V on one and 0.48V on t'other. #2 is showing 11.98V on both.
So from that I assume something is amiss but I have no experience on Fuel Injection and am a bit unsure how to proceed now.
Any suggestions, please?
Thanks.
Andy