When I shift from 2-3 I get a sudden 8 degrees of KR and it slowly reduces over time. It does not look sawtooth at all, but rather a smooth ski slope.
Any ideas? (Log attatched)
Sudden full knock after shifting
When I shift from 2-3 I get a sudden 8 degrees of KR and it slowly reduces over time. It does not look sawtooth at all, but rather a smooth ski slope.
Any ideas? (Log attatched)
Do you hear anything mechanically bumping (e.g. exhaust on chassis)...?
Is burst knock active in your tune? Burst knock shows up as KR on the scan tool.
The Tremor at AIR
No bumping that I can hear anyways. Wouldn't that be a short knock burst if something was hitting?
I'll have to log burst knock once. I was told to leave burst knock alone because it needs to be there..
I logged burst knock and it never registered anything. Does this mean its false knock from something hitting, or something in the tune?
There is a way to tell if it is false knock or not through a log, I think it is that if the spike happens and then tappers off slowly it is a false knock, maybe someone else can chime in on this topic.
Here is a link to some screen shots of real knock Joe put up. http://forum.efilive.com/showthread....e+knock+in+log
2005 1500 HD , Custom OS3 SD tune .
2006 Trailblazer
Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .
Hard to tell looking at log, your at 4500 RPM and 44% TPS then floor it.
4500 RPM 44% TPS and 26.5 spark advance goes to 9.5 spark advance when TPS% is 100 and KR is 7.7 should be 18.8 so in tune your loosing 9.3?
Knock in your log does not look like real knock!
A better log would be a WOT run from lower RPM. Not WOT from 4500 RPM. The way your logging it, it looks like noise?
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