Hey guys, need to know what may be the problem with my LS swapped Civic. The problem is when I start my car it jumps all the way to 3 grand and goes down to 0 and keeps jumping up anywhere between 2500 and 3000 and then back to 0 and so on and so on. I have tried taking out the FITV (thanks YBlegal) and tightening the ring-cap and it was very loose but after tightening it, it made no difference. I also took off the IACV and cleaned the screen with a tiny cloth and still no difference. I am pretty sure my TPS is set correctly according to the Helms manual. Is there any other ideas? My car used to stop idling crazy after warm-up but now it is always jumping even after I get off the interstate from an hour long drive.

Also this may be unrelated but inside my car on my ex gauge cluster I am not getting a temperature reading? Could this be causing the fluctuating idle? Also wha could be the fix for this. All plugs are secure into the cluster so I am thinking it is something else.?

Any help would be greatly appreciated. Thanks in advance.