1990 suzuki alto problem

lollypop28, Apr 19, 4:06am
starts good,runs well.travel 3k to the shops get back in after 5minute stop and it runs so rough,spits and splutters sometimes comes right after a few k.changed plugs makes no difference,could be carb.though the car is a simple design the carby is so complicated ,so many extra hoses and wires,any ideas,thanks