2007 Mazda 6 engine is stalling when stopped or stopping
Asked by Stuart
The engine of my 2007 Mazda 6 sedan fades and then stalls when stopped, or stopping at an intersection. I can see the idle speed is about 500rpm at the point where it stops. What might the cause be and what is a solution?
Answered by CarsGuide
15 Aug 2024Most mechanics will do a complete check up and tune of the engine as part of tracking this problem and it’s a good start, because a new set of spark plugs and plug leads might just fix this problem. But that won’t always be the case. As such, you could be looking at a dud sensor somewhere in the engine bay that is telling the on-board computer to shut things down or, at least, not providing the computer with enough information to keep it all running. For this reason, an electronic scan of the vehicle should also be carried out at the same time to see what fault codes are cropping up.
A prime suspect for this behaviour would be what’s called the engine’s stepper motor which is a small electric motor that controls the throttle body and, therefore, the car’s idle speed. If this motor is maladjusted or faulty, it could cause the engine to either idle roughly, too slowly, or stall altogether. But have the scan done before rushing out to spend money on parts that may or may not be the problem.
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