Eklipze3k said:

No, MES is MultiECUScan - aftermarket software specific to FIAT family ECUs, so will be able to pick up not only all of the "unknown" codes but also provides realtime monitoring. It costs £50, requires a Windows laptop and an appropriate set of cables, but is a must if you want to do your own maintenance.
As you take the car to a garage, I suspect you're not too handy with a set of tools? So, if we knew where in the country you were, one of us with MES could come and have a look at the car and see what we can see

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lmrtw said:

Other than plugging in the MES, given the symptoms does anyone have a hunch to what it could be? (coil pack, fuel filter, fuel pump, etc)

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lmrtw said:

Hi,

Its the 1.4 8v. I think it can be prone to jerking when the engine is cold and hot, however it definitely jerks once the engine is fully heated up. If you drive at a fairly constant 30mph (or there abouts) it will always do it at some point, sometimes sooner, sometimes later, sometimes once or twice, sometimes many times. If you are not doing a constant speed its less prone to happening, if at all.

I generally do short trips (to and from work which is around 10 miles each way) however I do go on occasional longer trips (25 miles+ each way) about once a week.

Have not seen any problems at higher speeds / motorway driving.

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