Hi guys. Trying to figure out why my tune is pulling so much timing at load. Its a turbo 5.3 SD operating system, stage 2 cam, Deka 80 injectors, turbo 400, Walbro 450. This file log is without the charge pipe on, no boost.
Hi guys. Trying to figure out why my tune is pulling so much timing at load. Its a turbo 5.3 SD operating system, stage 2 cam, Deka 80 injectors, turbo 400, Walbro 450. This file log is without the charge pipe on, no boost.
Fueling is a mess right now, the fuel trims show that it's very lean all the time. Like adding 20-30% a lot.
Your IAT's are through the roof, so when you look at your IAT spark correction table that is pulling out 7-8 degrees of timing right there. You'll want to scale that table back some with a turbo, your IAT's are always going to be over 80-90 degrees, so scale it back to start pulling timing after like 110-115 degrees.
You have burst knock still on and you are not logging the knock sensors at all in your logs. So you can't see if knock retard is pulling timing away too.
Disable abuse mode too. Set that to 7,000+ rpm and 0mph. Max out the torque mngt tables for max torque vs rpm and the torque limit vs rpm, raise that table from 350 to 600+.
Turn off brake torque mngt in the systems options tab too. Change it from 1 to 0.
You'll want to adjust your PE settings as well. Turn the enable down to 50%, lower the throttle pedal enable down to like 60% and raise the PE enable KPA to 85-90%.
The log needs way more data, that is the only way to figure out what is doing what. Add in any spark channel that could be pulling timing, like the IAT, ECT, torque mngt stuff. The knock retard channel. Add in the injector pulse width avg channels so you can watch your injector duty cycle. The log is missing commanded AFR or EQ ratio (lambda) as well as any wideband oxygen sensor data for tuning.
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.
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