intermittent black smoke - update

[Phil Rose]

At 4:56 PM -0400 7/14/11, Jean-François Roldan wrote:
>Hi,
>
>Seems like the michelin man hose was the 
>culprit... I am very curious to try it when I 
>pick it up tomorrow morning...
>
>So why was it intermittent then? only when I 
>ever tried to accelerate a little bit while on 
>the highway?
>It didn't do it at lower speeds like 30 mph... 
>but then again I didn't try to floor it either 
>just to check...

Example of the Michelin Man "burp"? The damaged 
rubber manages to keep up with IM pressure up to 
the point where a little tear suddenly releases 
pressurized intake air (burps) and you lose 
power. Won't happen at lower speeds because the 
turbo hasn't spooled up enough to reach the 
"critical" pressure...Sorta like how you can sip 
beer slowly for a much longer time without 
belching compared to the effect of a quick, big 
gulp?

Not sure why this is accompanied by black smoke, 
although you would momentarily be running very 
rich when the "burp" occurs.

Phil
-- 

Phil Rose
Rochester, NY
mailto:pjrose at frontiernet.net