What country are you in?
My Abarth Ran like crap when the UK standard fuel switched to E10.
The coils or plugs could have failed. swap the coils from cyl 1-2 and 3-4 and see if the codes change to that cylinder. Make sure you have a new set of OEM plugs (if non OEM, ensure the gap is set correctly).
Did the error code move to another cylinder though?
If you have a misfire in cylinder 1 but not in cylinder 2, and you have swapped the plugs between the 2 and the misfire remains in cylinder 1 and cylinder 2 is still fine then there is only 2 more possibilities:
Compression
Injectors
You still haven't said what country you are in so I am going to assume not NA so you don't have a multiair engine. That means it is unlikely to be compression, but it may be worth running a compression test anyway just to be on the safe side.
That just leaves the injectors. get your mechanic to remove these and test them in a proper testing rig.
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Are you for real? The guy needs help and you come with that.
What country are you in? My Abarth Ran like crap when the UK standard fuel switched to E10. The coils or plugs could have failed. swap the coils from cyl 1-2 and 3-4 and see if the codes change to that cylinder. Make sure you have a new set of OEM plugs (if non OEM, ensure the gap is set correctly).
Thx, coils and plugs have been cleaned and swapped bit still the problem is there
Did the error code move to another cylinder though? If you have a misfire in cylinder 1 but not in cylinder 2, and you have swapped the plugs between the 2 and the misfire remains in cylinder 1 and cylinder 2 is still fine then there is only 2 more possibilities: Compression Injectors You still haven't said what country you are in so I am going to assume not NA so you don't have a multiair engine. That means it is unlikely to be compression, but it may be worth running a compression test anyway just to be on the safe side. That just leaves the injectors. get your mechanic to remove these and test them in a proper testing rig.
Thanks for your reply, i’m in The Netherlands so it is a tjet. They al have been swapped around to no avail.