car is 1989 efi cvh XR3I with 99k miles

for a long time the car has run lumpy on idle and the battery light has glowed when driving even though the battery is in good conidition and the alternator has been bench tested by the local auto electricals, any ideas? not necisarrily linked but the mot guy said may be so

the fuel pressure regulator looks like its had a hole drilled in the bit that faces you as you look under the bonnet (wtf?)

had new leads and plugs

thanks for any help