[Shotimes] Re: Compression Test Results

Zach Leahy Zach Leahy <leahyz@gmail.com>
Thu, 23 Jun 2005 09:25:28 -0500


Yeah, that's not an oil smoke issue, that's an unburned hydrocarbon
issue.  Most engines will produce a bit of this when torqued on, and
even though you were revving w/o any load, for a moment the load based
on increasing the rotational momentum of the engine is enough.  It's
the result of a slightly too rich mixture and some of the fuel coming
through unburned.  That's normal as it is safer to be a bit rich than
a bit lean, so they design it that way.  You get  abit of unburned
(excess) fuel through the system that get's mostly burned in the
catalysts, but does produce some soot.  That's what you see.

You're fine, don't worry about it, drive it till the wheels fall off. 
An oil issue would create a blue/whitish smoke, not black.

Z

On 6/23/05, Kevin Galuska <whitegen1sho@hotmail.com> wrote:
> Here is the video that started me trying to figure out what is going on. I
> was doing a before and after exaust sound test with aftermarket y-pipes.
> This is the before video with the stock ypipe because I never did the after
> video due to the "cloud". Turn your sound on.
> www.monmouth.com/~kgaluska/video/exaustbefore.avi
> If you dont have sound for some reason that cloud appeared around 4 grand
> and not on startup. It appears to be brown in color. Does this shead any
> light on my situation.
> Thanks for the help,
> Kevin
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