i have a 87 mustang 5.0 ho its running rough and dies when i come to a stop also it vibrates like crazy i have to double foot it just to come to a stop or slow way down i have replaced the cap rotor button wires ignition coil plugs the previous owner deleteed the smog and egr i have cleaned the iac i put a new air charge sensor and when u get up to about 50 it starts running decent but not like it should i also reeplace ignition control module and the tps sensor plzz plz help