I got a set of 42 lbs. with about 15000 miles on them and they are noisy ( sounds like rockers loose but its definately the injectors) the car is starting to slightly load up on cold starts and wants to idle fast at stop signs until I rev it once then it'll drop down. Is there a place where these can be rebuilt? if not what is the best injector to buy cause I wont be buying another set of these. thanks,