White smoke on acceleration

passat
smoke
exhaustsystems

#1

1999 VW Passat with 70,000 miles sends a puff of white smoke from the exhaust pipe while accelerating. Any ideas what the problem is?


#2

Is it a diesel or gasoline? Does it make a difference warmed up vs cold start?

Unfortunately, if it’s doing it all the time, that white stuff is burning coolant which means you’re probably looking at a head gasket.


#3

Agree that coolant must be entering the combustion chambers, and you should fix it right away! On older cars with vacuum modulated automatics, it could be transmission fluid due to a ruptured diaphragm.


#4

Stand behind the car while someone accelerates the car. Does the smoke smell like antifreeze or like fuel (gasoline or diesel)?
If it smells like gasoline, there’s a fuel injection problem.


#5

Gasoline

And just a puff while accelerating, not a constant white smoke


#6

Tom,
Who are you answering, Hellokit or GreasyJack? Is your answer that it’s a gasoline engine, or that the exhaust, upon acceleration, smells like gasoline?
Your answer could be the salvation of mankind…Well, not really!


#7

Gasoline Engine

I don’t know the smell at this point.

Sorry for the confusion,with mankind hanging in the balance!


#8

It could also be vaporized water that accumulated in the exhaust system while driving without accelerations, but you need to smell the exhaust too.