Bad idle, Rpm unstable
What cause this problem ? Idle move from 600 rpm to 1100 and drop to 400 and back to 1000 non stop. ?
All explain are approximative value.
The model is Mazda protege 2002, 2.0 Lit
The ODB read a alarm code miss fire.
Some people think that could be a timing belt problem
The mileage is around 109 k km
Thank you in advance
Yvon, does your OBD give you a numbered error code? It is possible that it is your timing belt, but it is also possible that it is your coil, cable, cam shaft or crank shaft position sensor, EGR valve and Idle air control valve, as well as many more items. The error code could help us diagnose it a bit better.