Hi All

 

I have a skoda superb which a bit lumpy on tick over when warm,

 

The car also had a shudder when slowing but this was solved by putting the idle stabisation from -1.5 to 00

 

Heres the readings from the VCDS

 

Thursday,04,July,2013,21:35:55:17906
VCDS Version: Release 11.11.6
Data version: 20121223


21:37:42 Group 001
  882 /min  RPM
  6.0 mg/str  Inj. Quantity
  8.2°KW  Idle Stabilization
  75.6°C  Temperature

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:41:32 Group 004
  882 /min  RPM
  0.0 °BTDC  Ign. Timing
  8.2°KW  Idle Stabilization
  0.0°KW  Idle Stabilization

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:41:42 Group 005
  861 /min  RPM
  12.1 mg/str  Inj. Quantity
  48.0  (no units)
  74.7°C  Temperature

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:41:51 Group 008
  882 /min  RPM
  0.0 Nm  Torque
  175.7 Nm  Torque
  139.1 Nm  Torque

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:41:56 Group 009
  882 /min  RPM
  -1280.0 Nm  Torque
  500.2 Nm  Torque
  139.1 Nm  Torque

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:42:02 Group 010
  225.0 mg/str  Mass Air / Rev.
  999.6 mbar  Absolute Pres.
  999.6 mbar  Absolute Pres.
  0.0 %  Load

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:42:07 Group 011
  861 /min  RPM
  1091.4 mbar  Absolute Pres.
  999.6 mbar  Absolute Pres.
  80.1 %  Duty Cycle

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03G 906 016 GS)

21:42:34 Group 013
  -1.62 mg/str  Inj. Quantity
  -0.78 mg/str  Inj. Quantity
  -0.16 mg/str  Inj. Quantity
  2.45 mg/str  Inj. Quantity

 

 

 

Regards

 

Chris

 

Number 4 injector is way off. It's either got a fault there or it's compensating for something like a DMF.

Hi

 

Thanks for the reply.

 

I dont feel any vibration from the DMF so hopefully its not that.

 

I notice sometimes when I put my foot down there is a cloud of black smoke.

 

I will get an injector this week and swop over no4 to see what happens.

 

Thanks

 

Chris

I'd swap 1 and 4 see if it moves.

Don't forget new adjuster screws etc and set them up correctly.

Check the side of the injector, see if its shiny in one place where the seals are.

I will give that a go tomorrow.

 

Whats the best way of setting the injectors ?

 

I have tried before with a dial gauge buts its not easy even with the heater plugs removed.

Thats really the only way to set them.

If you centre the inlet valve cam lobe on the roller follower pivot centre, you will be at the right set point. Opinions vary as to the correct injector clearance tight - 180 or 225 degrees.

 

rotodiesel.

Hi 

 

Thanks for all the replies .

 

I will have a set of injectors this tuesday which a friend has give me out of an engine that put a leg out of bed.

 

Just one other thing I notice the top cam sprocket bolts are not dead center and are fully to the left would this cause any issues?

 

Thanks 

 

Chris

In theory no unless the torsion value is out and can no longer be brought into spec.

The slots for the cam sprocket to hub fixing bolts allow adjustment in all circumstances to achieve the correct torsion value "KW". Where the bolts end up within the slots is of no consequence - all sorts of factors will change the position including skimming the head or a small change in belt length on renewal.

 

My engine had the bolts fully to the right of the slots before I changed the belt. They are now almost fully to the left. The difference is in fact one tooth pitch if you measure it up with a straight edge, so for an engine which has the bolts at one end, you could shift the belt by one tooth and the bolts would be at the other end of the slot.

 

There is much rubbish talked about the position of the bolts - the important thing is KW. (kurbel winkel = cam angle). If that is correctly set, the bolts can be anywhere. When I changed the belt on my AWX, the bolts ended up at the opposite end of the slots - moved by 1 tooth. KW is correct and it ran well before and runs very well after the change.

 

rotodiesel.

Hi

 

I,m glad I asked the question now as I was told they had to be dead center or it would effect running and I was about to take the belt off to try and center the sprocket.

 

Whats the correct idle stabalization, Torsion value for the 1.9 BSV engine?

Aim for 0, yours seems to be spot on.