My RPM has been weird lately. If I'm moving and I disengage the clutch, sometimes the RPM will drop and stay at 1000, but usually it'll hang just below 1000 or sometimes drop below Idle RPM.
When just sitting at a stop, the idle sometimes feels a tad rough as well.
My gas mileage also took a small hit since this has been happening, maybe 1-3 mpg. I cleaned my IAC and throttle body, replaced the Crank case vent connections from the front of the crank case to the side of the throttle body, and yet the problem still persists. I know that when I push the clutch in, my RPM should drop and stay at 1000, cause it did that for the first year and a half that I owned it.
I have a 1999 4cyl with the AX-5.
What could the problem be?