Hi guys, i'm unsure how to do this in vcds, anyone help?

What is the problem you are trying to solve?

Usually when people ask this question they have an underlying problem such as faulty glow plugs or a faulty glow plug relay. You should solve all outstanding problems before trying this.

To change the value,

Log into the engine (IIRC the code is 12233)

Use group 12 adaption.

The default value is 32768. Reduce this value to extend the on time.

What is the problem you are trying to solve?

Usually when people ask this question they have an underlying problem such as faulty glow plugs or a faulty glow plug relay. You should solve all outstanding problems before trying this.

To change the value,

Log into the engine (IIRC the code is 12233)

Use group 12 adaption.

The default value is 32768. Reduce this value to extend the on time.

Thanks for that. The problem I am trying to solve is rough running from cold, lots of smoke, as if timing is out. Runs fine when warmed up. Timing is bang on via VCDS, coolant sensor is showing correct temps when cold. No Fault codes at all. Next stop is glow plugs & MAF.

Edited 21 December, 201114 yr by YHNW

Thanks for that. The problem I am trying to solve is rough running from cold, lots of smoke, as if timing is out. Runs fine when warmed up. Timing is bang on via VCDS, coolant sensor is showing correct temps when cold. No Fault codes at all. Next stop is glow plugs & MAF.

What colour is the smoke - white, blue, grey or black?

What colour is the smoke - white, blue, grey or black?

grey/white

grey/white

Sounds like timing to me. It could be the basic timing or the ECU adjusted timing.

Can you confirm that when you checked the timing, you put the pump in basic mode, the coolant temp was at 90 and the car was idling smoothly? The timing should have been on the ideal or slightly advanced.

Sounds like timing to me. It could be the basic timing or the ECU adjusted timing.

Can you confirm that when you checked the timing, you put the pump in basic mode, the coolant temp was at 90 and the car was idling smoothly? The timing should have been on the ideal or slightly advanced.

I agree it feels like timing is out when cold. Not sure about the pump being in basic mode...how do I do that? I could only get the temp up to 80 due to it being 0degs out side at the time. I checked the 80deg box and the timing is advanced slightly over the ideal. The car was idling smoothly.

Edited 21 December, 201114 yr by YHNW

I agree it feels like timing is out when cold. Not sure about the pump being in basic mode...how do I do that? I could only get the temp up to 80 due to it being 0degs out side at the time. I checked the 80deg box and the timing is advanced slightly over the ideal. The car was idling smoothly.

When checking the timing with VCDS you must put the pump in basic mode. This means that the timing you would be looking at is based solely on the position of the bolts on the pump sprocket. Basic mode disables the ECU adjustments to the timing. If this basic timing is not correct, then the ECU will not be able 'pull in' the timing in all conditions.

IIRC, the correct procedure is

[Engine]

[Measuring Blocks]

Group 0

[switch to Basic Mode]

[TDI Timing]

When checking the timing with VCDS you must put the pump in basic mode. This means that the timing you would be looking at is based solely on the position of the bolts on the pump sprocket. Basic mode disables the ECU adjustments to the timing. If this basic timing is not correct, then the ECU will not be able 'pull in' the timing in all conditions.

IIRC, the correct procedure is

[Engine]

[Measuring Blocks]

Group 0

[switch to Basic Mode]

[TDI Timing]

Right I'll check that this eve - many thanks.

Right I'll check that this eve - many thanks.

Actually thinking about it, it is through the 'basic settings 04' that I get to the timing graph. So yes it has been timed with the pump in basic setting.

I checked and the timing was done in basic settings.

I can't find anything unusual in the readings, have disconnected the MAF, no difference in running, same with the CTS

However, when idling the inj quanties on cyl 1 seemed notably different to the other three:

1.88 -0.52 -0.89 -0.49

Could this be my problem?

Also removing the MAF and CTS brought an error code each one, however nothing for the glowplug relay...is this as it should be?

cheers!

Edited 21 December, 201114 yr by YHNW