TravisR Posted September 8, 2020 Share Posted September 8, 2020 Morning, Just a quick question, I know with the SCT data logging, when the numbers were negative it would mean the PCM is adding timing and obviously positive numbers is retarding timing. Is this the same for the PCMtec logger? Thanks, Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 8, 2020 Share Posted September 8, 2020 50 minutes ago, TravisR said: Morning, Just a quick question, I know with the SCT data logging, when the numbers were negative it would mean the PCM is adding timing and obviously positive numbers is retarding timing. Is this the same for the PCMtec logger? Thanks, I'm not aware of that being the case. The knock adder array negative values mean it is subtracting timing, eg there is real knock, positive means it is adding timing (though from factory they don't). This is the same as SCT/HPT. If you log the actual timing value, then that is the real final commanded timing value. Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 8, 2020 Author Share Posted September 8, 2020 Awesome, thank you for the quick reply! Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 10, 2020 Author Share Posted September 10, 2020 Just to quickly follow up on this one, I notice there is another channel (Knk Sensor Spark Adder) which is actually adding timing while the Spark Adder Average For All Cylinders is removing timing. Any advice would be muchly appreciated! Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 10, 2020 Share Posted September 10, 2020 Can you share a log file? Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 10, 2020 Author Share Posted September 10, 2020 Attached is the log, around time 475. Knock.teclog Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 10, 2020 Author Share Posted September 10, 2020 I also notice my MBT and BLK are different even though I've made the tables the same and I'm fairly confident I've removed all the adders that could be adding/removing timing. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 11, 2020 Share Posted September 11, 2020 Ok "knock sensor spark adder" is actually a maximum limit the knock control can add back to the spark timing. Where as spark adder average for all cylinders is how much spark is being pulled due to knock. Knowing this I would log "spark adder average for all cylinders" only as the other one is not really useful to monitor. Looking at your logs you are getting -3 degrees of knock retard which is too much. If you log Knock Adder Cyl1 Knock Adder Cyl2 ... Knock Adder Cyl6 You can see which cylinder is knocking. If this is a BF/FG with 2 knock sensors this should be reasonably accurate. You can tell if you have a blocked injector etc fairly easily this way. Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 11, 2020 Author Share Posted September 11, 2020 Yeah I just don't know whether to trust it, I've taken bulk timing out, it even starts pulling timing while cruising with 30 degrees of spark, I'll definitely be dialing it back just to play it safe for now until I get some headphones on it. I don't have those parameters to even log, I've only got the spark adder average one. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 11, 2020 Share Posted September 11, 2020 You should always use real knock ears. False knock is very common on the older motors as they get so noisy. Is it showing knock on all the cylinders to just 1? Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 11, 2020 Author Share Posted September 11, 2020 Yeah will do, I can't monitor on each cylinder, the only parameter I have under knock is the average spark adder. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 11, 2020 Share Posted September 11, 2020 What version are you using? Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 11, 2020 Author Share Posted September 11, 2020 1.23, tried the beta too, doesn't appear to be there. The Spark Adder Knk Sensor Array is there when I'm not connected to the vehicle but when I do datalog, it dissapears. Catch code is HAEE3A4 Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 11, 2020 Share Posted September 11, 2020 You need to add it from the list when connected to the car then save the layout. Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 12, 2020 Author Share Posted September 12, 2020 Still not there while connected to the vehicle. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 12, 2020 Share Posted September 12, 2020 Are you using workshop edition? If not the selection is fairly basic. Quote Link to comment Share on other sites More sharing options...
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