violent bucking when reaching 1 bar boost

[Eugene Kanter]

My car has developed similar behavior. Turning ignition key off for a
second or two and then on when car is still running and in gear and
problem goes away immediately: full boost with no bucking. I am really
puzzled....

Eugene.

PS. The michellin man hose has been replaced recently - old was not
leaking but showed its age.


On Tue, 2003-09-02 at 19:17, Brett Dikeman wrote:
> > hey guys, from the first day i had my 20v almost 2
> > years ago from time to time under high boost it would
> > violtenly buck once and when you let off and boosted
> > it back up again it was fine.  this has happend more
> > and more frequently, never knowing what it was i just
> > figured it was a weird thing and would be somthing i
> > would have to deal with.
>
> Absolutely not- the car should be very smooth.
>
> I can almost guarantee you have a boost leak.  Remove and inspect the
> michellin man hose for cracks, as it is the most common culprit.  If it's not
> that hose, and all your clamps are tight...you will make life a thousand times
> easier for yourself if you build a pressure tester and test the system:
>
> http://www.audifans.com/pipermail/200q20v/2000-August/000283.html
>
> ...otherwise, there are a dozen plus places you could have a leak.
>
> Your O2 sensor is probably fried as well(leaks cause super-rich running), and
> I'd fathom a guess that your catalytic converters didn't look too happy when
> they came out.
>
> Brett
> _______________________________________________