2000 civic lx, 69000 miles. 2months car suddenly idled very low (100rpm) all the time& check engine light came on. Code said o2 was bad. Changed top o2 sensor, disconnected batt to clear code, everything fine for a few weeks, then the low idle again, but no check engine light. Drove for 2 months like that, with low idle at least half the times I drove. Then car started " surging" while driven. Light came on, code says cylinder#4misfire/random misfire. Sure enough 1 of the 3 distributer cap bolts snapped off causing a small gap ( cap wasnt seated all around). Replaced bolt, disconnected battery to clear code, now car idles low, surges while driven and no check engine light. Car will idle low with a/c on as well.
also, sound like a bird chirping coming from engine area but occures when idling (mostly low idle) and in unisome with bumps in the road. PLEASE HELP! : (
Monday, September 4th, 2006 AT 4:45 PM