Hi all

Just wondering if I could get some opinion/help from this group.

I have 1.4 Tsi EA111 Twincharger 160ps/118kw (yr 2011)...which has a problem of lumpy/shakey idle during cold start (morning/evening/day....especially when the car has been resting for more than 12 hours).

This lumpy/shaky idle is occur only during the first 45-60seconds warm-up (during 45-60sec...as usual rpm goes higher to about 1250-1300)....then go back normal (no lumpy & no shaky) after that when rpm drops back to normal idle 700-750 without AC on.

I have changed all engine & transmission & dogbone mounts with OEM torque spec about 4 months ago.

Oh 1 thing I noted about this lumpy/shakey idle (during the first 45-60sec warmup with high 1250-1300rpm) is....eventhough this lumpy/shakey idle will go away after this cycle completes & rpm drop to 700-750.......you can always interrupt it.

Means when it's lumpy/shakey...if I turn off the engine before 45-60s warm up complete & restart the engine again.....it will not be lumpy/shakey (at least much better).

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The second problem that occurs in the last 3 weeks is misfire only at cyl1....during idle (at any time) if AC is turned OFF.

Misfire's count & second's count almost the same....(can be as high as 40-60 misses in 60sec).
Then it will trigger P0301 without CEL.

This cyl1 misfire will sometimes stop....then reset 0....then start again after some minutes.....it will always be like that as long as I have not turn ON the AC.

Once I turn on the air condition......no more misfires on cyl1 during idle (with AC on...rpm will go slightly higher from 700-750 to 850-900).

Tried swapping coils around & changed new plug on cyl1....misfire still stay at cyl1 (with AC off)

I use 06E905115E coils & BKR6EIX gapped to 0.75mm

I am hoping to maybe there are some tips/experiencs I can get from anybody.

Many thanks

Regards
Kent

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