thanks,i'll check all my plugs on the whole harness, being that i just dropped the engine in,something may be loose or dirty. the car is a 93accord SE sedan. very nice ride,just those 2things have been buggin me.other than that it runs fine. by the way,the 92-93 accords as well as certain preludes all have extenal coils.i was thinking maybe i should replace it as well.im just tyring to avoid spending a ton only to find the problem small. the engine came from a 93 lx. the intake manifolds were different but not by much,i used the manifold that came with engime and ditched the one from the SE.it was clogged and extremely dirty. the plenum was slightly bigger and had a weird airbox like thing bolted to it with a few small hoses.i didn't wanna deal with all that so i used the one that came with the engine.im not sure if that has anything to do with wats going on with it but i dont think so.