i have an annoying problem on my neon, the car idle's is good, but when i run at 2,100 rpm +/-, the car start to misfire at WOT or regular throttle, and when i reach the 4,200 rpm +/-, the car run just fine, what can be the problem?

 

Spark plugs!!!

 

Das2123 i changed the sparkplugs, but it wasnt, a wire connector was broken.... u.u

 

Yep, that would do it too. Glad to hear all is well again.