KR during rich condition???
OK, back to square one ... re-did my initial AutoVE setup, 15% added to VE-tables, commanded AFR looks a lot better under WOT ... got the first 40min run down for correcting the VE tables, but where is this knock coming from? With AFR values in the 11 and 12 range, and rather low RPMs, what could be causing this? Bad timing?
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
P.S. - in order to get more info on the KR situation, I checked the available maps ... one plots the KR against the CYLAIR value, which is a calculated PID against MAF ... can I instead use one of the DMA-CYLAIR PIDs, as I don't have the MAF connected during AutoVE ... I suppose they won't work then, either ... guess I could re-connect the MAF for a KR testrun ...
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
Looks to me like you've got too much timing for such high load at low rpm...
Use GM.CYLAIR_DMA or GM.DYNCYLAIR_DMA (they should read the same in speed density), and alter your map to display using that as your column data field instead of CYLAIR.Originally Posted by Garry
Justin
OK, will do ... (with or w/o MAF re-connected?)
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
Driving on a normal road, it's more or less the only way to get the high MAP cells filled ... low speed, high gear, pedal to the metal ...
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
It's still too much timing there. I'd be surprised if you can't hear the pinging (and definitely can feel it). My 02 had similar KR with the stock timing table. Pulled the timing out of the lug-zones there and it runs a lot better... although I prefer not to drive in those high-load, low-rpm ranges.Driving on a normal road, it's more or less the only way to get the high MAP cells filled ... low speed, high gear, pedal to the metal ...
What mods have you done to your powertrain ?
As for the PID suggestions, CYLAIR_DMA is the one to go with, MAF or MAFLess, as it is what the PCM uses for computations. As per the scan tool PID description, DYNCYLAIR_DMA is the speed density airmass. This can be confirmed by logging both CYLAIR_DMA and DYNCYLAIR_DMA and comparing your results while in speed density vs mass-air.
It's not exactly my normal driving style, either ...
Nothing yet ... may get some stuff done through the winter, though ...What mods have you done to your powertrain ?
OK, so I'll leave the MAF out and just logg both CYLAIR PIDs, see what I get out of that ...As for the PID suggestions, CYLAIR_DMA is the one to go with, MAF or MAFLess, as it is what the PCM uses for computations. As per the scan tool PID description, DYNCYLAIR_DMA is the speed density airmass. This can be confirmed by logging both CYLAIR_DMA and DYNCYLAIR_DMA and comparing your results while in speed density vs mass-air.
Tnx
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
Garry, It looks to be Burst Knock Retard you are experiencing there.
Cheers Scotty
It's a lot easier to ask for forgiveness than it is to ask for permission.
I will be loggin the DMA DYNAIR PIDs on the way home, from what I read here on the forum that may/should give some insight whether it's real knock or BKR ... !?
Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)
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