Hello Briskodian's  

Wonder has anyone came across unusual engine vibration ? Seems like both hot or cold engine - makes no difference ... 

160 k km so not too high .

Cannot determine pattern or rootcause seems it just appeared out of nowhere , although to be honest alternator is making some sort of bearing wear noise ( perhaps clutch on pulley is also gone - tensioner doesn't  indicate so tho, no vibration or excessive movements) . 

 

Decided to hook up VCDS and investigate further :

  086   Engine oil temperature-TOIL 65 °C
  087   Engine speed 779 /min
  163   Injection amount deviation cylinder 1-FAC_CYL_BAL1 -0.2232 mg/stroke
  164   Injection amount deviation cylinder 2-FAC_CYL_BAL2 -0.4429 mg/stroke
  165   Injection amount deviation cylinder 3-FAC_CYL_BAL3 -0.4081 mg/stroke
  166   Injection amount deviation cylinder 4-FAC_CYL_BAL4 1.0769 mg/stroke
  168   Injection valve 1; voltage-V_INJ_MAIN[0] 121.54 V
  169   Injection valve 2; voltage-V_INJ_MAIN[1] 121.05 V
  170   Injection valve 3; voltage-V_INJ_MAIN[2] 121.54 V
  171   Injection valve 4; voltage-V_INJ_MAIN[3] 116.60 V
  172   Injector valve 1; capacity-CAPA_INJ_MAIN[0] 6.0089 µF
  173   Injector valve 2; capacity-CAPA_INJ_MAIN[1] 6.0172 µF
  174   Injector valve 3; capacity-CAPA_INJ_MAIN[2] 6.0089 µF
  175   Injector valve 4; capacity-CAPA_INJ_MAIN[3] 6.3930 µF

Injector 4 ? From owning 1.9 PD engine I recall that -/+ 2.8 are normal amount - still quite high . Is it trying to compensate for something ? It's known that just because there is deviation in injection amount it is not a solid indicator for injector failure - so what could it be ? DMF ? 

 

Does anyone recommend purging  - Liquid Molly ( seems like solution to go with ) ?

 

Hope someone has some sort of ideas

 

P.S. First post - been registered for good few year and lurking around ! 

Seems this topic has been moved to Octavia ? How can i move it back to Fabia MK2 category? 

2 hours ago, benquw said:

Seems this topic has been moved to Octavia ? How can i move it back to Fabia MK2 category? 

I don't think it was there initially but I've put it where you've asked now. 

Few years down the road the injector has failed and has been replaced, expecting few more to fail. Apparently known problem with CR injectors.