re: empire
i tried isolating it to a single cylinder but no luck there, i even replaced the plugs and wires and tried still the same, so its no single cylinder, but what i dont get is that majority of the time i have no issues idles perfect no misfires etc. the distributer cap and rotor was replace about a year ago.

one other thing i noticed anytime i step on the brakes the idle drops 100 or so and when i let off the brakes it goes back up 100 or so. the electric fan kicks on too it does the same thing. Could it be a bad distributer? or could the timing be slightyly off? but like i said it doesnt do it all the time?