Hi im new to the forums and was looking to see hopefully someone that knows way more about the 2.4 4g64 could point me in the right direction to start diagnosing this goofy problem just bought this 1991 mighty max all original airzona truck not a spec of rust or rot anywhere just got the transmission rebuilt as well but the issue im having right now is that if i cruise normal city speeds truck is phenomenal but running at 45 to 60mph range only at part throttle itll hiccup and sputter i just did plugs wires and cap and rotor since all of it was original to the truck im not too sure where to exactly start diagnosing any help and guidance is greatly appreciated