Hi !

I have a Ford Focus MK3, 1.6l, Yi-VCT engine, 92 kW (125HP). It's a great car, i love it, it's my first FORD..

 

BUT i have a BIG problem !

 

A while ago, I noticed that, while the car is stationary, when the engine rises above 1500 rpm there is a trembling of the engine, which IS NOT present at idle (under 1500 RPM) ; this tremble gets stronger at around 2400 rpm, then it disappears if rpm rise....

It does not matter if the weather is cold or hot, if the engine is cold or warm, AC or not.... Simply, over 1500 rpm,  this trembling appears at different values of rpm.

I note that the engine presents no sign of power loss while driving, and the service maintenance was made according to the manual, using original parts and fluids.

 

In authorized  FORD services, the engine was IDS diagnosed (but no errors at all !!!) , the spark plugs/ignition coil were changed, the upper and rear motor mounts were changed, but nothing has changed! They did not know what was the cause, so I left the services without solving my problem.

 

So, I need your advice ! What parameters should be tested ? What parts should be investigated / changed to identify the issue ?

 

Thanks in advance for every reply !

If the engine pulls well when you are on the move and doesn't hesitate or stutter then I really wouldn't worry about it.  The ecu has been mapped to fuel under load the engine may not like being revved with no load hence your issue.  My focus also has a similar characteristic.

Thanks for the reply ! The engine works well on load ... but I do not think it's NORMAL to shake, at no matter rpm value! It's not my first car ... but none had this problem (despite the low cost construction)

Mine shakes a little at idle its the ecu making sure the emission levels are within limits think you will find most modern cars have some form of vibration at idle

Thanks again for answer ! I will post soon one clip with this annoying tremble ...

i have the same engine and mine does not do this. So when you rev the engine over 1500 the whole car trembles? This is not normal, although depends what you mean. The desiel engines are quite noisey. Have you tried changing the fuel filter?

Hi, Siye-SZ ! Thanks for reply ! Yes, at 1500 rpm and 2500 rpm (aprox.) the whole car trembles ... At idle, at 2000 rpm, at 3000 rpm don't shake ...

... Look at how obvious it is the tremble  at 2400 rpm ....

https://youtu.be/JO2BsfBoKBc

 

Still no having any solution for this tremble ....  :(       And I don't know what to investigate ...since even the "specialists" from Ford service are unable to find the issue :(

i cant see, the video it says its been removed. Sorry for late reply

Sorry ... new link :

I found another interesting site, where is presented the same (??) problem :

http://www.fordserwis.com.pl./awaria_sterownika_pcm_w_focusie_mk3_1_6_benzyna,Awaria-sterownika-PCM-w-Focusie-MK3-1.6-benzyna

Sorry ... new link :
[/url] I found another interesting site, where is presented the same (??) problem :
http://www.fordserwis.com.pl./awaria_sterownika_pcm_w_focusie_mk3_1_6_benzyna,Awaria-sterownika-PCM-w-Focusie-MK3-1.6-benzyna

Hello, did you maybe solve your problem, because I have similar simptoms...I have Mk3 1.6 ti vct 105 hp, and i also have trembling of the engine on 1500rpm and cca 2500 rpm, everything else is without shaking, i changed front engine mount without result and in service they dont know what is it? Now it has 67000 km and on cca 25000 km everything was normal...car goes well but it is annoying...thank you

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Unfortunately, I have not solved anything ... I still gather information, how to identify the cause of the problem and what is the solution.

The polish guys from fordserwis.com.pl say : "We can not send you how solve problem without car.We have to perform diagnostics of the car - this is possible only in our garage."

I have the same issue like yours. My engine run is 37000 km. The service said it won't cause any damage, and maybe the VCT drive has some interference, but they wasn 't sure.

But now I have new a problem:  cold temperature the engine doesn't works well, its loses power under acceleration.