hello everyone in my 89 i have a 2.8L v6 and for some reason its only running on 4cylinders garage told me i needed new ignition coil so i went out and replace all 3 coils and then it sounded like it got a little better but im sure its still on 4cylinder cause when i drive it acclerates really slow and i have my foot to the floor and no passing gear or anything can anyone help me with this

 

Check the basics, plugs, wires, compression, fuel injectors. you need to find out which cylinders are misfiring and go from there.