i have had this problem before and changed my o2 sensor then my coil ignighter, was ok for a while now its happening again, so i changed my o2 sensor once more and still is happening and even worse. the car is a first gen b-16a what car do i get the ignighter for i think its for a 88-91civic but not too sure. this will solve the hesitation problem right? or am i going in the wrong direction to get this fixed. by the way i have an aftermarket header so i am running one o2 sensor.