So Ive had this sputtering problem with my car...It sputters when I acclerate between like 1500 and 4000rpm....people have told me its the ignition system, I changed the cap and wires and stuff, still does it, this one guy said his lude did the same thing, replaced the coil, and it worked..I dont have the moneys to change it, so, havent done that yet, other people tell me it can be the tps, but if its the tps, wont the check engine light come on?