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Old 06-08-2017   #1
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Poland 
Engine vibrations

Hi,

Few days ago I picked up an orange barchetta '95.
Unfortunately there is something wrong with engine.
On idle i can feel vibrations and strange noise.
Link to video youtu.be/UHacdCGSuXQ


It has new spark plugs and air filter.
I also cleaned idle control valve and coils.

Regards
Maciek
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Old 06-08-2017   #2
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Re: Engine vibrations

hi there !
as a first step , make a MES diagnostic and see if any error code pops out !!
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Old 09-08-2017   #3
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Re: Engine vibrations

Some suggestions to look at:

o Failed spark plug

o Failed ignition coil

At the low RPM in the video it sounds/looks like the engine is only running on 3 cylinders and the vibration is rock/workload of driving compression in one cylinder with no reciprocal power output delivery from that cylinder.

I could be wrong but worth checking!.
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Old 09-08-2017   #4
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Poland 
Re: Engine vibrations

Diagnostic was done, unfortunately no errors .
On lambda graph its shows strange bevahiour on low rpms.

And yes on low rpms it's running only on 3 cylinders, but sometimes it runs on all.
Spark plus are brand new, I will try to replace 2 coils, it looks like second and forth cylinder is not running properly.
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Old 10-08-2017   #5
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Re: Engine vibrations

You can never assume that the new sparkplugs are not defective, unusual I know but I have had this situation.
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