PicoScope 7 Automotive
Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available.
terbo wrote:Hi,
Looking at a 2006 1,2 L 3-Cyl. BMD-Engine in a Polo i did a Snap-Throttle Capture.
Car has a VERY long story to it,but that is maybe for a later Post.
What i can not get in sync in my Head is, why is there a second pressure after the
Compression when snapping it, while at idle the Pattern looks fine ??
And if the WPS is not lieing, it is over 1,5 BAR !!!
I thought maybe Exhaust pressure, but connection to the front O2, we
can not get the Gauge to get over 1,5 PSI (not BAR as in the Pico image) even
at reving it to the Limit ??
We did the same Test with the WPS500 with the front O2 removed complete,
but besides a heck of a sound in the garage, the pattern did not really change for this "bump".
The Engine has no Variable cams or anything fancy.
Maybe it is normal, i would love to compare a other car against it, but
can´t get a hold of one at the moment.Maybe next Week or so.
Maybe someone can explain , why it would be normal, because i
would think, there should not be this Pressure at that time.
Looks to me that you have a compression leak.