jj86

hey my 86 5.0l was idleing funny so i but a new idle valve on it today now it idle fine but now when i drive and im like on the freeway the car bog out a lil bit it sounds like it miss fires inside the cylinder it was doing this before i put the new idleing valve on so if its not the idleing valve wat else could it be . can it be the distrubter rotor is missed up or its off timing? can some1 help aite thanx