2.0 TDI BKD 140HP Cold Start Problem

abpostelnicu

Veteran Member
Joined
Feb 20, 2010
Location
Wonderland
TDI
2.0/ 3.0 TDi
Hello,

Once the temperatures dropped well bellow 0 degrees the car began to start badly when it was left overnight. For example at -10 degrees the car starts very poor. I need to stay that the spark plugs are brand new - NGK 4.4V and the battery is also brand new, Varta Sylver Dynamic 74Ah.
I did some logging using VCDS, and it seems that on engine module channel 12, once i put the contact the pre-glow period is set to 1.61seconds and the status is 0101000, that means No-Preglow. Seeing this i tend to belive that the car starts without the glow plugs?
I did another test, a friends advised me to do it, i switched the contact on and off for about 6-7 times and only the 7th time i've started the engine, i must say that the engine started way way better, almost like a normal engine start.

Any advice is well appreciated and i must state that the car starts perfecctly when temperature is above 0 degrees.

thanks Andi
 

TDIMeister

Phd of TDIClub Enthusiast, Moderator at Large
Joined
May 1, 1999
Location
Canada
TDI
TDI
Don't install spark plugs in an engine that takes glow plugs.
 
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