Hiundai problems help

Hello friends, I need your knowledge, I have a problem with a Hiundai Elantra year 92, they took it towed to the workshop with ignition problems, review it and notice that there was no spark in the cylinders but if in the cable of the coil, so it changed cables, cover and distributor rotor and walked well one day, then they took it to change the power spark plugs and for a problem of oscillation in the minimum Let it change autolite spark plugs by Bosch Super plus and clean the air input load and when you give anything at all I do not want to turn the current in the spark plugs again and if there is what it does not exist it is a pulse in the injectors, someone can give me a hand please I need to solve beforehand thanks.