Hey guys, I know this is an ITR board but I feel that most of the knowledgeable people post here, so I figured I could get the most help here.

Anyways, I own a 99 Civic Si, 46,000 miles on the odo. Well, yesterday when I was pulling her in the garage, I noticed that there is a pretty audible rythmic clicking or actually clucking, sounds almost like the olld diesel benzes. I revved her up and the clicking sound goes away, and all I hear is the normal valvetrain sound spining up, but when at idle, the sound comes back. Also, after some revving when I let her go back to idle speed, it tends to drop below normal idle speed and almost stall, this happened maybe twice out of the 15 times I did it. I have a toda flywheel and clutch, the weather in Houston got a bit cool yesterday also, and my friends were telling me that the idle could be a little messed up due to the colder weather and the ECU has not adjusted itself yet, I'm not to sure about that. I've had the flywheel on for over 20,000 miles and even when i first got the flywheel on, it never made that sound but it did want to stall at first. Sorry if this question has been brought up before, but just a bit concerened. Am I just being paranoid and worrying for nothing or is there something wrong? Any input on this would be great

 

Did you...

...check the oil?

...check the plug wires?

...check the plugs (let it cool to ice coldness, first)?

Without hearing it - worse case scenario - you're f-ed. Best case scenario, you're running on 3 at idle because you've got a loose or bad plug wire.

Get a manual - follow the simple diagnostic steps therein...