[Vwdiesel] morning flatulence

rOLf peCHUkas rbp at 4u2bu.org
Sun May 1 00:44:55 EDT 2005


got to watch the tire guy start up my van today and drive it in to his 
shop
puff of black smoke on startup (then clear exhaust after that - it's 
always clear when it's running and I check it - although I've never 
followed it up a hill)
question: how bad is that black puff? what does it consist of? (it does 
not smell particularly good)
suspicion: may be caused by no GP cycling
when engine is warm but not hot GP circuit doesn't engage and start is 
not instant
black stuff = unburnt/poorly burnt fuel? like creosote from a woodstove?
haven't observed exhaust from a cold startup (will tomorrow) but w/ 
full GP cycle, start is chick-vroom - I suspect black exhaust is less
thoughts?
thanks
Rolf
Cambridge, MA



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