Is there a way to tell what system is retarding engine timing? When going full throttle, the timing drop to 17 degrees retarded then slowly recovers.
Is there a way to tell what system is retarding engine timing? When going full throttle, the timing drop to 17 degrees retarded then slowly recovers.
2012 ZL1 automatic, CAI intake,
Yup.
You can log knock retard, burst knock and both the IAT and ECT advance, those can add or remove timing based on intake air temps and coolant temps.
Knock retard would likely be real knock picked up and burst knock is a predicted knock that can reduce timing during throttle transition. Like when stabbing the throttle and there is a large airflow/torque change.
Also torque mgnt could reduce timing to keep traction there.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Thanks for the reply. I'll add these PIDs to my list. I think it might be a traction control issue. The traction control torque percentages drop when the timing is pulled. If you have the time, check out the log.
Thanks
Scan with traction control on and light on, second half with traction control off.hpl
VCMSuiteInfo.txt
2012 ZL1 automatic, CAI intake,
Yeah, you weren't logging anything can show where the timing is going. Once the stuff is added you'll likely find a good reason as why it's going on.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
I'll re-log with your suggestions and re-post. Thanks for your time.
2012 ZL1 automatic, CAI intake,
I did a re-log with more PID's. Nothing stands out except for burst knock at the initial hit of the throttle, which I assume is normal? I'm still not sure what traction control torque and traction control desired torque means. The PCM could be thinking that the wheels are spinning (which they are not) and retard the timing. I looked at HP Tuners website and could not get an exact definition. I attached the log if anyone is interested.
Traction control engaged (on), Stabilatrac came on 9-5-17.hpl
Thanks
2012 ZL1 automatic, CAI intake,
Doesn't look like your knock retard is being logged, it is always reading zero.
Max
Does anyone have an explanation of what traction control torque and traction control desired torque means?
2012 ZL1 automatic, CAI intake,
You do not have enough PIDs you may want to try these.
Not sure how to open the file and make sense of it.
2012 ZL1 automatic, CAI intake,
This is a list if PIDs. It goes in the the HPT dir C:\Users\????????\Documents\HP Tuners\VCM Scanner\Channel Configs
I'll see if I can get the file there and look at it. Thanks.
2012 ZL1 automatic, CAI intake,
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