As I was driving my 2001 Mazda Tribute today I was pulling up to a red light and I depressed the clutch pedal as I came to a stop. Once the clutch pedal was depressed the revs suddenly shot up to 3000rpm without any accelerator engaged. Since then it has happened whenever I do the same and the revs will not drop unless I engage the clutch in gear or I let the clutch pedal up upon which it will very slowly decrease in revs to the normal idle engine speed. As I am driving the car now feels like I have cruise control (it doesn't!) as the car will not naturally decelerate even though there is no accelerator engaged.
I thank you for any help you can give me in advance as if it is a simple fix it could save me a trip to the mechanic!