today i noticed that my car is really running and idleing rough. if im crusin down the highway at a steady part throttle it seems like the car hesitates (almost kinda bucks). i installed underdrive pulleys on friday, i dont know if this could have anything to do with it?

i also have a few problems ive noticed since i had the car for the past few months. if the engine is cold when i start it it will stumble and then stall if i dont give it some gas. it will also stall randomly when im crusin down the road (only happens every so often). i have replaced the plugs, wires, cap, and rotor in the past month or so.

i know these are kind of weird questions but any input would be great! this is really starting to bother me now is there anything i could check that might be giving me these problems?? thanks again and sorry for the long thread.

 

check your firing order this happend to me. also check your tps and iac

 

using the paperclip method check to see if you have any engine codes. let us know if anything pops up

 

very smart listen to dougie let us know