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Old 12-10-2011, 01:19 PM   #1
Bill in Mtl
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Default Phantom knocking - updated 12/17

Is it possible for the ecu to be picking up phantom knock ? I flashed an updated rom about a month ago, after revising the timing to address a knock issue. I have been running the car for about a month, and the knock is still there, in the exact same fields as previously

I first reduced the timing by one degree in those ranges, the knock remained - reduced the timing by another degree, and as seen on the latest learning view - knock is still there in the exact same two fields - everything else seems to be pretty good

Has anyone either seen this before, or had a similar issue ? Any feedback greatly appreciated. Sorry for the size of the image - I cannot get it any larger on my netbook ?





Thanks for looking

Regards,
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Last edited by Bill in Mtl; 12-17-2011 at 01:26 PM.
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Old 12-10-2011, 03:33 PM   #2
Airboy
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Which map are you using?
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Old 12-10-2011, 03:57 PM   #3
Bill in Mtl
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Bullwinkle 06-07 5MT GMBCS-GrmSpBCS Map

Downloaded it from Romraider

Thanks
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Old 12-10-2011, 04:32 PM   #4
NSFW
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1.5-5 is a very wide load range. Consider changing the FLKC range boundaries to 1, 1.3, 1.6, 1.9, 2.2+ or something like that. That will help Learning View give you a little bit better idea of where the knock is happening.

But I don't think Learning View is the right tool for this job anyway. We need logs to show what's going on here. Is it happening in the middle of a WOT pull? Right when you stab the throttle? While spooling up? After spooling up? Right when you left off the throttle?
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Old 12-10-2011, 04:51 PM   #5
Bill in Mtl
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Thanks for the reply - I will put some more time into this and get some logs together to be in a better position to reply

Appreciate your time

Regards,
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Old 12-17-2011, 01:48 PM   #6
Bill in Mtl
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Quote:
Originally Posted by NSFW View Post
1.5-5 is a very wide load range. Consider changing the FLKC range boundaries to 1, 1.3, 1.6, 1.9, 2.2+ or something like that. That will help Learning View give you a little bit better idea of where the knock is happening.

But I don't think Learning View is the right tool for this job anyway. We need logs to show what's going on here. Is it happening in the middle of a WOT pull? Right when you stab the throttle? While spooling up? After spooling up? Right when you left off the throttle?
I revised the FLKC ranges as mentioned above, and got in a pretty good run with log. Unfortunately did not get to WOT on this log, but do have enough info to try and tune the knocking out. Much smaller range makes it easier to see - and hopefully deal with

Thanks again - appreciate the help

Here is the latest learning view after my run / log - and the log makes it very easy to see where the knock is happening. As soon as I sign up to a site that hosts files - I'll add the log as well






Regards,

Last edited by Bill in Mtl; 12-17-2011 at 02:00 PM.
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