I have a 2003 5-Speed manual transmission Mazda 6 and have had some issues while driving it. At random times I will lose power and completely slow down to about 10 miles an hour. The traction control off and the traction control light both come on and my RPM jump from 500 to 1500 back and forth. I took it to a shop and they tried replacing the throttle body thinking there was an issue with it or possibly with the throttle body position sensor. They tried 4 different new throttle bodies, none of which solved the problem. Next they replaced the wiring harness and that still did nothing to solve the problem. Lastly they reset the computer and nothing was fixed. They refunded us our money and told us there was nothing they could do. I'm wondering if there's anyone that has had similar issues and how they went about fixing it.

 

Take it to Mazda for a Diagnostic code check.