so i just changed my plugs with ngks... well i don't think this is the reason for the symptom i am about to describe but there it is if you think so. so whenever i seem to "get on it" or slowly move the throttle to wot it studders, feels like the car stops then goes, its gettin kinda bad, i suspect the tps but i am not sure, its a jdm h22 i've been driving it for 3 months fine, this is a new problem, been going on for 2 days now.

any ideas would be great, if i can think of a way to better describe it later i wll.

 

I would double check your cam and ignition timing first. If timing is off it will definitely cause a stutter like you describe.

Though, if it happened only because you changed your plugs it could just be a bad connection somewhere in your spark plugs or wires.

TPS would be a good thing to check also.

 

i think your spark plug wires arent long enough! take one out and measure the distance from the top to the bottom inside where the spark plug goes and whatever measurement that is measure the spark plug wire... had a similar problem and turned out my spark plug wires were to short... just a thought