Technical Section > Troubleshooting

2.2 occasional stutter at cruising speed

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mhulks:
Hi
Our 2015 2.2 Sport Nav has given us trouble free driving. However recently, only occasionally, there is a brief shudder at cruising speed.
Had it looked at and MAF sensor was fine but MAP sensor was bunged up so washed clean. However the same brief shudder has happened on a drive today.
There are no engine management lights on at all. And seemed to be given a clean bill of health when the MAP sensor was cleaned.

Some owners are suggesting a walnut shell blast carbon clean is required...at a cost of £800 by Mazda.

Any advice would be really appreciated.

Willpower:
This might sound outlandish, but have you got your aircon system on Auto ? 
This sometimes causes a shudder when activating.

mhulks:
Not from memory, I don't think.

I've never noticed it coinciding with messing around with any aircon settings.

AndrewT:
I've definitely had that once or twice in my 2018 2.2 sn, it's making me want to sell / PX it before the warranty runs out.

Andrew

mhulks:
Hey Andrew T - I know, i'd be lying if I hadn't been thinking the same. What mileage has your vehicle done?

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