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Message: <blockquote data-quote="Twista" data-source="post: 559729" data-attributes="member: 8202">I posted in the tech section but not much activity there from some people i think would know other solutions.So, after changing midpipes for emissions my car developed a stuttering Putt putt hestation down low in the rpms. Even if i try to gun the engine i get the putt putt sound out of my exhaust pipes. You can hear it pretty good inside.. What the hell would cause a car to PUTT PUTT???What the hell is causing this? I have no power down low because of the putt putt and i doubt changing the midpipe would cause this. I brought some new o2 sensors which are on the UPS truck right now.Im going crazy because i need my car working. I already cleaned the MAF and changed the air filter. The fuel filter is maybe 3 years old. The rest has been on the car for over 4.5 years of me owning it. Soultions please? Could spark plugs cause this kind of putt putt? Or what?If it is the spark plugs than can a noob change them without freaking anything up?GOD :BangHead: :BangHead: :BangHead: :angry4: :angry4: :angry4: :angry4:</blockquote>