Ok, I am about to go absolutly nuts. I am having an idle problem with my civic. I have an h22 in a 99-00. I just put on pullies, cam gears, and a flywheel. The car fluxuates its idle from around 500 or 600 rpms to 1000 to 1200 rpms and it just pulses as if i was pressing the gas on and off. Ive checked my vacuum and cant find a leak. Anyone that has any ideas would be greatly appreciated for I am close to dropping a 10 ton weight on my head as I would never do it to my car.
thanks

 

check to see if you have low coolant levels or bleed your coolant.

 

r you implying putting the pullies and cam gears and flywheel on somehow caused the problem?

 

how did this start? is it a new swap? more background info.

 

how did you check for vacuum leaks? did you check the Idle Air Control Valve and the Fast Idle Thermo Valve?

 

maybe vacuum hoses hooked up in wrong locations. I'm just guessing.

 

Had the same problem on mine. 90% sure it's the fast idle valve. Unscrew the 3 bolts holding the valve underneath the throttle body. It'll have a coolant line coming off the front of it. The valve has a plunger-like mechanism inside that opens and closes when the motor is warming up. Check and see if the plunger has worked its way from the pin inside the valve. Simply unscrew the back plate on the valve to access the plunger. Using a flat-head screwdriver, screw the plunger back down some and reassemble the valve. Hope it helps!