I have a 2009 Mazda 3 1.6 sport dynamic hatchback the Z6 motor and since last year when I did the clutch my Ideling is not the same anymore. When I'm driving and stop at a stop street sign or a robot the ideling is above 1000rpms some times it goes up and down then when I press the aircon switch then the rpms come down to below 1000rpms and due to that my car is heavy on fuel. I did replace the throttle body position control sensor as a mechanic told me that's the throttle body position control sensor that's gone. Does anyone have advice for me on this problem. I don't have a photo right now. The milage on my vehicle is 288206km

The transmission is hard to shift, and gets worse as the transmission gets hotter. I have adjusted the shifter cable, lubed all external linkages, flushed and bled the clutch hydraulics, and changed the transmission oil with OEM.

The problem started when I had a mechanic clean my car's throttle body (it's a 2011 model with 90,000 km; I haven't driven it much). Since then, it has had idling issues. The engine suddenly revs up to 1,500 rpm and then drops back down. I’ve visited several mechanics; one suggested the neutral switch was the culprit (which makes sense, as pressing the clutch when it revs causes the acceleration to stop and the RPMs to return to normal levels). Another mechanic ran various tests on the throttle body—including a smoke test to check for leaks—and while the frequency has decreased, the issue still occurs about 10 times during a half-hour drive. What can I do? Thanks.

Whenever the AC compressor clutch engages the AC gives off a loud static noise. Its very embarrassing and wont stop. The AC is working though.