Hi my name is Dan and I have owned a 02 Subabru Impreza WRX for about a year now.
Whenever I shift gears, my rpm spikes about 300 to 600 rpms once I push in the clutch. It mainly does this in 3rd and 4th gear, and the more throttle I give it the more the rpm's spike when the clutch is in. The spike is only for a second then it goes back to normal. Im sure the gas pedal ins't in when I push the clutch. i have driven clutch for my whole life and this is the first time I've had the problem. i thought it might be a sticky throttle but have looked it over many times. It doesn't stick from what I can see.