Lately my civic has been idling really weird. When I am moving, but not pushing the gas and dont have it in gear, it'll stay at a constant 1000 for about 2 seconds, then go to 2000 for about 2 seconds, and repeats. I have a feeling its either a sensor, or the bad grounding problem I've been having lately.

 

fix the ground first. that could be it.

 

Is this grounding kit any good?
http://www.robearracing.com/pd_hyper.cfm

 

Vacuum leaks can cause bad idle. Be sure to check all your vacuum hoses for any problems.

 

the bad ideling could be caused by the bad ground or the vacuum leak but its most likely that its either low on radiator fluid or the radiator is clogged. i have a 92 honda lx 140k it would overheat and idel would range from 1000 to 2000 and some times idel fine at 3000, the radiator was in fact clogged ive changed it and it runs and idels fine the best place to find a radiator is ebay

 

I'm not overheating though.

 

do the grounds, you should fix that anyway.

 

yeah i just ordered a new grounding kit earlier today. hopefully thatll fix the problem.