Land Rover S3 with F50 Engine will not idle when cold


I have a 1980 land rover fitted with a daihatsu 2.5 taft engine, it starts well but will not idle and i have to keep the revs up a bit till warm, also it's jerks when going slow unless i keep the revs up, i have changed the fuel filter but with no change, could it be the injectors needing replaced, also i am having trouble getting parts so will the later 2.8 injectors fit. thanks.

Have you tried a cloths peg

Have you tried a cloths peg on the throttle cable at the injector pump end to advance the throttle a tad Unknw

How did you bolt the landy gear box onto the engine Unknw