5SP TDI
Veteran Member
Engine starts fine when cold, but with a "stumble/misifre" for first 5 seconds?
I have owned my 2003 TDI now for 2 years and it has always had some sort of "stumble" or "misfire" for the first 5 seconds after a cold start. When I say cold start the outside ambient temperature and engine temp can be 70 degrees to 10 degrees. Symptoms are more noticeable the colder it is. Car runs and idles perfect after the first 5 seconds, 10 seconds on the really cold days.
I recently replaced the timing belt and associated parts from IDparts and used the Metalnerd ALH timing belt tools. Pump timing and VCDS timing are perfect, actually "slightly advanced". The glow plug harness has been replaced and I just replaced the glow plugs this weekend and still have this stumble.
Is this normal for the TDI or should these cars start and idle perfect from any temp with no stumbling or misfiring type symptoms for a few seconds? If not normal should I check into air leak for fuel system, IQ quantity, compression?
Thanks!
Jeff
I have owned my 2003 TDI now for 2 years and it has always had some sort of "stumble" or "misfire" for the first 5 seconds after a cold start. When I say cold start the outside ambient temperature and engine temp can be 70 degrees to 10 degrees. Symptoms are more noticeable the colder it is. Car runs and idles perfect after the first 5 seconds, 10 seconds on the really cold days.
I recently replaced the timing belt and associated parts from IDparts and used the Metalnerd ALH timing belt tools. Pump timing and VCDS timing are perfect, actually "slightly advanced". The glow plug harness has been replaced and I just replaced the glow plugs this weekend and still have this stumble.
Is this normal for the TDI or should these cars start and idle perfect from any temp with no stumbling or misfiring type symptoms for a few seconds? If not normal should I check into air leak for fuel system, IQ quantity, compression?
Thanks!
Jeff