I was going down the road today and I hit the clutch and put it in neutral to stop and the engine revved down and died. It did this twice. When I would stop half the time the engine idled around 500-600rpms the other half it idled at 300-400rpms and almost kills. What is the possible cause of this? Thanks

 

You can try tightening your throttle cable (by the intake manifold).

 

Does this commonly get loose with civics? Also, what do you need to tighten it?

 

12mm wrench

 

This happened to my car a long time ago, and just recently after I put in my JRSC. The regular things to check are the idle screw on the bottom side of the throttlebody by the throttle cable. Also, make sure you don't have any vaccuum leaks. Aside from that, I guess when they're adjusting idle, you need to unplug a vaccuum line I think? I'm not quite sure of the process...maybe somebody more technical could explain?