Mr. P.
December 24th, 2009, 12:27 PM
OK starting a new thread here to not clutter-up the thread on data logging -
I haven't strayed very far from VE tuning yet (learning as I go). I will have to ask you guys for some insight, I've got three issues -
Attach are the latest logs, as well as the current tune. I am not asking for outright "answers" or tune fixes (although they are appreciated!) but any quick experience or insight so I can continue to learn and figure it out on my own I'm eternally grateful for.
The vehicle is 2003 Silverado SS with LQ9 - spark plugs are TR6's gapped at .33" The OS is COS3, I am running OLSD with PE & DFCO disabled (I think?) I have been driving and mapping VE up to 4000-RPM, there has never been any smoothing applied to the VE table. The High-octane spark table is based off my NA one with high-load cells set to 17-degrees advance. I have not been able to VE tune into the A0009 Boost VE table very far yet. At the high-demand end of the commanded AFR table I ramp AFR up to 11.8:1 for safety during the VE mapping process. In the log file external input #1 is a PLX wideband; I work in EQR units, so I log ERQ and have custom pids that calculate AFR & EQR both and display them on my dashpage.
1) on decel (overrun) the RPM wanders and hits the stall-saver, when the vehicle is stopped the managed idle takes over and it idles fine, I think I read somewhere this is just not enough running airflow. ???
2) the motor spits and cuts apart at 4000-rpm if the MAP > 100 kpa, I thought this was the A0009 Boost VE table being too rich, but logs suggest that it's not the issue. Also there is no KR and spark is 17-degrees so I don't think this is the issue either, I am not sure how to troublshoot from here.
3) I get a single spike of KR on trans kickdown; I don't know where to go to address this as I'm just learning...
But so far the tune is IMO coming along well, the truck is AWD and will rip all 4 tires loose from a stop before boost comes in, and it's very strong for 4-psi, I haven't been able to spin the motor higher than this without breaking up.
Mr. P. :)
I haven't strayed very far from VE tuning yet (learning as I go). I will have to ask you guys for some insight, I've got three issues -
Attach are the latest logs, as well as the current tune. I am not asking for outright "answers" or tune fixes (although they are appreciated!) but any quick experience or insight so I can continue to learn and figure it out on my own I'm eternally grateful for.
The vehicle is 2003 Silverado SS with LQ9 - spark plugs are TR6's gapped at .33" The OS is COS3, I am running OLSD with PE & DFCO disabled (I think?) I have been driving and mapping VE up to 4000-RPM, there has never been any smoothing applied to the VE table. The High-octane spark table is based off my NA one with high-load cells set to 17-degrees advance. I have not been able to VE tune into the A0009 Boost VE table very far yet. At the high-demand end of the commanded AFR table I ramp AFR up to 11.8:1 for safety during the VE mapping process. In the log file external input #1 is a PLX wideband; I work in EQR units, so I log ERQ and have custom pids that calculate AFR & EQR both and display them on my dashpage.
1) on decel (overrun) the RPM wanders and hits the stall-saver, when the vehicle is stopped the managed idle takes over and it idles fine, I think I read somewhere this is just not enough running airflow. ???
2) the motor spits and cuts apart at 4000-rpm if the MAP > 100 kpa, I thought this was the A0009 Boost VE table being too rich, but logs suggest that it's not the issue. Also there is no KR and spark is 17-degrees so I don't think this is the issue either, I am not sure how to troublshoot from here.
3) I get a single spike of KR on trans kickdown; I don't know where to go to address this as I'm just learning...
But so far the tune is IMO coming along well, the truck is AWD and will rip all 4 tires loose from a stop before boost comes in, and it's very strong for 4-psi, I haven't been able to spin the motor higher than this without breaking up.
Mr. P. :)