cold start injection value?

02 jetta

Veteran Member
Joined
Feb 13, 2008
Location
morrisville,NY (central NY)
TDI
2003 Jetta gls sedan
Is a cold start value of 35% in chanel 04 of the adaption screen when the coolant is 195 degrees farienhiet to high? Could this mean I have a faulty fuel temperature sensor?
 

peteguenther

Well-known member
Joined
Sep 24, 2017
Location
vermont
TDI
2003 Jetta
I would be interested to know too if anyone has suggestions. Should cold start drop to zero at full operating temp?
 

peteguenther

Well-known member
Joined
Sep 24, 2017
Location
vermont
TDI
2003 Jetta
Also I just checked with vcds and found that with the motor (ALH) fully warm showing 88C the cold start injection duty cycle reads 3percent at idle but jumps to about 30 percent driving - does that seem wrong and a cause for poor mpgs?
 
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