Can't edit COS

[sinr98]

Hey guys I went to flash my stock PCM with my current tune from Wait4Me performance, and come to find out I have two different OS. The stock OS is 12585950 and the W4M PCM is running 12587603. The reason I was flashing the stock PCM with this tune is because I am sending the other PCM back to Jesse to tune for a cam swap and some other little things. I don't know enough about tuning yet that I feel comfortable tackling this.
So I searched for the correct OS for the stock PCM and the W4M PCM and was going to convert the stock PCM to the 04073003 COS. I didn't do any flashing with the new OS. I was trying to convert my tunes from one another and it wouldn't allow me to edit the COS. So what I did was I sat both tunes side by side and went through every file and copied the W4M tune to the stock PCM with the stock OS.

Is this an acceptable way of converting everything since it will be a temp tune? And is there anything that is hidden that I might have forgot? I will post up my stock tune, stock modified tune, and W4M tune if anyone wants to look them over and make sure I have everything.

It took about 2hrs to copy - paste everything. Thanks for the help.

[ScarabEpic22]

What controller? If its an LS1, you could just full flash the W4M tune in and upgrade it to a COS.

[joecar]

Which vehicle/year/model...?

Your PCM has OS 12585950 and W4M tuned tables, right...?

You want to run 12587603 in your PCM, right...?

The 12587603 file does not have the W4M tuned tables, right...?

If yes on all 3 questions, then you have to copy the W4M tables from the 12585950 file to the 12587603 file just like you have done (table-by-table).

[ some people do this by creating a script, this involves zeroing all the tables, the script writes the differences from zero, this still takes 2 hours ]

Then you have do full flash of the 12587603 file (which now contains the W4M tuned tables).

[joecar]

And then after that, when you're ready to go from 12587603 to 04073003, you know how to do that...?

Steps:
- full flash 04073003,
- cal flash 12587603,
- read PCM and save to file 04073003_0000.bin, this will be your first operational COS file.

[ in the scantool properties set the bin filename to 04073003_<seq> ]

[Chevy366]

Hey guys I went to flash my stock PCM with my current tune from Wait4Me performance, and come to find out I have two different OS. The stock OS is 12585950 and the W4M PCM is running 12587603. The reason I was flashing the stock PCM with this tune is because I am sending the other PCM back to Jesse to tune for a cam swap and some other little things. I don't know enough about tuning yet that I feel comfortable tackling this.
So I searched for the correct OS for the stock PCM and the W4M PCM and was going to convert the stock PCM to the 04073003 COS. I didn't do any flashing with the new OS. I was trying to convert my tunes from one another and it wouldn't allow me to edit the COS. So what I did was I sat both tunes side by side and went through every file and copied the W4M tune to the stock PCM with the stock OS.

Is this an acceptable way of converting everything since it will be a temp tune? And is there anything that is hidden that I might have forgot? I will post up my stock tune, stock modified tune, and W4M tune if anyone wants to look them over and make sure I have everything.

It took about 2hrs to copy - paste everything. Thanks for the help.
The OSs are both for a 04 Silverado , but the 5950 is for a 6.0L and the 7603 is for a 5.3/4.8L , trans segments will probably be different , seeing one is 80 and the other 60 .
Hmmm , you would think if you viewed a modified tune with a non-modified tune of the same OS in the same Tune Tool Window you could create a script from those differences .

[joecar]

The OSs are both for a 04 Silverado , but the 5950 is for a 6.0L and the 7603 is for a 5.3/4.8L , trans segments will probably be different , seeing one is 80 and the other 60 .
Hmmm , you would think if you viewed a modified tune with a non-modified tune of the same OS in the same Tune Tool Window you could create a script from those differences .Both good points:
- must have same transmission segment,
- script from non-modified->modified os the same OS.

[sinr98]

Here is the *.tun files for both the stock 12585950 (04072901) OS, and the W4M 12587603 (04073003) OS. A majority of the differences were in the trans tables.
My truck is an 04 Silverado SS with the 6.0L and AWD. I have Plugs, Wires, CAI, P&P tb, Headers w/o cats, Magnaflow muffler, 160* t-stat, 8.1L truck injectors, and a built trans. Thanks for your help guys.

[sinr98]

Here is my modified stock tune from copy/pasting from the other tune to the stock tune and OS.
Also my truck has the 4L65E trans and the other Silverados with the 4.8 and the 5.3 had the 4L60E. The 2500's had the 4L80E trans in them.