That is good to no mate as i have no clue what i'm doing

basically it stalled the other day so i called aa out he told me i was getting a weak spark and told me to change the coil (i ordered one) i used the car yesterday for work on the way no problem on the way home 20 mins into the journey it died again and started about 20 mins later then died about 10 mins after that and 5 mins again after that lol (pain in the ahole) i tried the car today and it started okay but didn't seem to idle very well and there seems to be no revs on the dash now if that makes sense the needle isn't moving any help would be awesome