New member looking for some input on tune

[izcain]

I'm making various edits to your tune file (shift, pressure, shift time, PE Enable...)...

you will need to install the latest software (to open .ctz files): Update-Oct-28-2014

I'm editing your WOT shift points because they are upside-down...

I believe I installed these updates already........

The Tune I posted other then changes that I listed was 100 stock as pulled from the vehicle, I am curious.............. I noticed the pe mode enable and shift issues, is this something that is normal for a stock engine tune for the lq4?

The pe mode looked like it would hardly ever be achieved unless you were into the throttle hard and so it seemed like it would make quite the difference moving that?

I didn't touch the wot shift points so it was just making me wonder why they would be upside down?

Just wondering if you have seen this in the stock files alot or if I have something someone may have messed with at sometime (unknown to me and I purchased it from the original owner whom said they had never done anything to their knowledge)

Thank you very much for taking the time to show me a few things! I am trying to read and research and learn as much as I can!

[joecar]

Truck files are usually like that, stock.

[joecar]

See attached, try it and let me know:

[izcain]

Ok so I was just wondering if you could explain some of the changes you did just so i can understand what it is doing. I noticed that the downshifts on all gears you have set to 100% tps? Wouldn't this force the trans to hold the gear? I noticed the stock tune had 100 percent but only on the 4-3 downshift.

Also if im understanding this correctly when you also change the part throttle shift zeroed out this is effectively taking all the softening of the shifts out on part throttle also? meaning the pcm purposely was softening them and now it will be mainly controlled by the acual shift pressures and times set up in the other tables?

Thank you for taking the time to look this over and give me some input! I will get this loaded here in a little bit (as soon as the broken cluster arrives fixed) and I will run a log and go from there.

[joecar]

Which table id's (I have to look at the table to answer your questions)...?

Basically I did this:
- allowed PE to enable easier (see 2001/2002 Camaro tune);
- set PE to provide sensible fueling rather then overfueling;
- set the WOT upshift/downshift MPH points to same values as the 100% TP cell in the PT upshift/downshift tables;
- introduced 3->4 upshift/downshift at higher TP values (was inhibited, but you should be able to have it);
- reduced the shift times;
- increased the shift pressures;
- some other things (I would have to do a compare).

[izcain]

Tables D0962, D0961, and D0960 are the table I was wondering about. It is showing that it will not downshift without 100 percent throttle? Just wondering if there is some other table with will help with downshifting? (want to make sure it still has a passing gear without having to go WOT)

Here is the stock tune as pulled just for some comparisons if you like.

Stock 04 Denali.ctz

I understand how pe will now activate (or should) and that it will be not overly rich but looks on the safe side

Under high load situations beings that it was not activating pe I wonder if it was really lean? guess without a log we wouldn't know I just cant seem to wrap my head around why they would not want it to go into that table under hard accel with a vehicle so heavy.

Also the 3-4 table D0903 table I am puzzled by.

[joecar]

D0960,1,2:
if not set to 100% these will interfere with the PT upshift/downshift tables and the WOT MPH parameters...
i.e. it will not shift when you think it should, and vice-versa;
if you look at the PT downshift tables you will see that when TP moves horizontally across the curve (toward the right) that you will get passing gear.

[joecar]

D0903:

old table: at 62% TP, the 3->4 shift was effectively disabled (146 mph).

new table: at any throttle you still get the 3->4 shift (should be able to achieve 120 mph).

[joecar]

I forgot:

you have to set the speed limiter (in the Speedo section) to 120 mph.

[joecar]

D0960,1,2:

See this: When-throttle-kickdown-is-not-set-at-100