In my 96 hx on the highway while driving at a constant speed the car feels like its misfiring or something. Like it dosent want to stay at the same throttle position for very long. Is this as easy as new plugs, wires...clean the injectors? Or could it be something more? Thanks.

 

yeah just do your basic tune up

 

yeah, i have this problem also still. its wierd. but i've used carb cleaner to clean the intake manifold. it should help out a lot. you'll have to use it every so often. i think it's because the manifold have been abused, running nitrous, water entrance, no filter, any such reason. you shouldn't have to replace the manifold though, it should run fine, only troubles with the throttle.

 

try injector cleaner. new plugs , fuel filter.