timing and fuel cut between shifts?

[SilverBullet6.0]

Can you guys give me some pointers on my 2014 silverado 5.3? I have a lot of the tune done, but I'm still getting timing and fuel cut between shifts. Not nearly as bad as stock, but it's still there

[SilverBullet6.0]

Immediate eng trq src goes to trans S during the shift.

[Ben Charles]

Trans Is doing it

[SilverBullet6.0]

yes, ive logged eng trq src and see thats its trans s, but for the life of me i cant find the table causing it.

[mowton]

yes, ive logged eng trq src and see thats its trans s, but for the life of me i cant find the table causing it.

Try Trans>Torque Management>Shift Torque factor....change all 1.0 to 0.5 watch for the changes in shift tm by shift sequence, adjust each accordingly. Reducing the value should reduce the amount of TM. You can then leave the Torque reduction features enabled above.

Ed M

[SilverBullet6.0]

That helped quite abit on the feel. A tad harsh now, but i can back pressures back down. Now, how do I get the throttle to not he so laggy? It does fine if I'm already on the throttle and just increase it, very responsive. But going from 0 throttle, there is a horrible delay.

[mowton]

That helped quite abit on the feel. A tad harsh now, but i can back pressures back down. Now, how do I get the throttle to not he so laggy? It does fine if I'm already on the throttle and just increase it, very responsive. But going from 0 throttle, there is a horrible delay.

A log would help as well as a copy of the tune.....

Ed M

[SilverBullet6.0]

I'll post both when I get home tonight. Out with the fiance right now.

[SilverBullet6.0]

What would you like to see in the log?

[mowton]

What would you like to see in the log?

Standards including WB (if available), VSS, RPM, Advance, Throttle position, ETC Desired Position, Absolute TPS, Delivered Engine Torque, Trans TqMgmt Type, time of latest shift for starters.

Ed M

[SilverBullet6.0]

I'll set up a cfg file for all that and get some logs...

[SilverBullet6.0]

Any of that specifically in chart or histogram? Or just table?

[mowton]

Any of that specifically in chart or histogram? Or just table?

Table and of course chart to be able to see the PID's. Histo's can set up as needed.

Ed M

[SilverBullet6.0]

Here is a short log showing how my throttle "ramps up"" instead of jumping to full throttle when i smash the gas. also shows the shifts, still getting fuel and timing cut with the changes you suggested. With the shift factor at .500 and shift times at 75% of stock, its firm, but still cuts fuel and spark. I tried -0.5 factor and it was way too firm. put shift times back to stock and it was still firmer than Id like. Shift pressure was set back to stock as well. I want to get the cuts lined out and torque management, then ill play with shift times and pressures to make the shifts feel good. Anyways, heres the log and accompanying tune.

14 silverado mod jeremy.hpt2014 silverado throttle lag and shift cut.hpl

[Joshtuning]

its super easy its just trial and error good luck on the tuning

[SilverBullet6.0]

Josh, care to elaborate? I've tried damn near everything

[SilverBullet6.0]

Shift torque factor, adder, up shift limit, axle limits, trans limits, driver demand tables. I've changed them all and made progress to a point, and then it falls off. What am I missing on these new trucks?

[SilverBullet6.0]

14 silverado mod jeremy.hpt

This is the current tune in it. Shifts feel better (firmer and quicker), but looking at a log and the fuel/spark cut is still there and lasts for the same ~0.2secs.

[SilverBullet6.0]

I turned the master disable ofd and it still occurs, immediate eng trq source still says trans s

[Joshtuning]

those that you mentioned have nothing to do with that delay you have to go more in depth into the transmission pm me