k-jet running issues

Hi bought a caddy sport as a non runner. Car had been sat for nearly 18months. Turned engine over to ensure not siezed. Tank was drained and inspected, changed fuel pump twice new fuel filter plugs twice Ht leads dizzy rotor arm,. I had injectors cleaned and spray patterns checked all ok passed mot on emissions. I had the timing been checked twice by 2 different garages all spot on now it wont start unless given light throttle then hunts on idle. Does not pull well through the gears when cold or hot feels like fuel starvation as judders if held at steady cruising revs 2000-3000 in 4th or 5th, revs fine when no load on engine. I have sourced a working WuR which I will fit as soon as I collect it can anyone point me to what I might be missing thanks Jeremy