6.5 diesel .xdf and adx

[newellshk]

I can't really give any suggestions about the warm starting. I would imagine that any combination of imperfect injectors, injection pump, pump timing, batteries, starter, etc would progressively cause harder starting, and adding fuel and/or timing might help in some cases. I would think that it would be safe to add 10-20% fuel to that table in the temp ranges you are targeting and see what happens.

I will try to find some time in the near future to look at the code that deals with starting and work to expand the tables/scalars and documentation for them. Maybe then I can give some better suggestions, but keep in mind I'm not an experienced diesel tuner.

[ohminen]

I can't really give any suggestions about the warm starting. I would imagine that any combination of imperfect injectors, injection pump, pump timing, batteries, starter, etc would progressively cause harder starting, and adding fuel and/or timing might help in some cases. I would think that it would be safe to add 10-20% fuel to that table in the temp ranges you are targeting and see what happens.

I will try to find some time in the near future to look at the code that deals with starting and work to expand the tables/scalars and documentation for them. Maybe then I can give some better suggestions, but keep in mind I'm not an experienced diesel tuner.

I looked BPDP documented hack's Cranking fuel RPM vs CTS. Bin address starting at 0x55D2. Temp ranges from-40 to 152. And RPM is 3 to 48 x 100. Cranking is usually about 300RPM. So could this be 3-48 * 10 RPM and temperatures in Celsius?

[newellshk]

It isn't 0-4800 rpm. The column variable is L00B5 which I haven't had time yet to decipher the math behind, but I have started working on it. There are also the tables at 557A, 558C, 559E (labeled CAL_CRANK_SEP_TIME_2, CAL_CRANK_PILOT_PW, CAL_CRANK_SEP_TIME), along with the constants above them, only some of which are labeled. I have those tables added to my xdf but I am still working on understanding them. The hack is really more like a bunch of hints because I've already found things that are incorrect, along with a ton that are labeled but the code isn't properly commented.

I should be able to get another iteration of the xdf posted by tuesday with most of the startup stuff added and at least partially documented.

[newellshk]

Here is a new version of the XDF. I have added most of the starting related tables but I still haven't figured out all of the math and probably won't until I get some time to datalog with an actual vehicle.

I have added some of the EGR stuff and most of the TCC unlock features. I still need to work on the TCC PWM settings along with lock/unlock delay times.

I also added the Pump Calibration Resistor Tables so you can copy from one to another to emulate changing the resistor.

I also added the Garage Shift Torque Reduction stuff which reduces torque output when you shift into gear from P/N above a configurable RPM or throttle position.

[brian617]

Anyone done any turbo boost table tuning on one of these trucks? I would like to at some tables to see where changes where made.

[quadstar87]

It isn't 0-4800 rpm. The column variable is L00B5 which I haven't had time yet to decipher the math behind, but I have started working on it. There are also the tables at 557A, 558C, 559E (labeled CAL_CRANK_SEP_TIME_2, CAL_CRANK_PILOT_PW, CAL_CRANK_SEP_TIME), along with the constants above them, only some of which are labeled. I have those tables added to my xdf but I am still working on understanding them. The hack is really more like a bunch of hints because I've already found things that are incorrect, along with a ton that are labeled but the code isn't properly commented.

I should be able to get another iteration of the xdf posted by tuesday with most of the startup stuff added and at least partially documented.

Don't waste time on the pilot injection stuff. It's not fully implemented in the stock code.

[brian617]

Don't waste time on the pilot injection stuff. It's not fully implemented in the stock code.

Got any boost table tips, or tables you might be willing to share? Be glad to post my .bin if you wanted to see my work.

[newellshk]

Here is a new XDF.

Added Transmission Tables:
Kickdown Shift MPH
Downshift Modifer vs APP
Upshift Modifer vs APP
Cold Engine Prevent Overdrive CTS thresholds

I haven't fully figured out the usage of the modifier tables but they are all set to zero in the bins I have.

[newellshk]

And another.

Added Kickdown Mode Enable/Disable vs APP
Re-added checksum correction that somehow was lost.

[quadstar87]

I can't really give any suggestions about the warm starting. I would imagine that any combination of imperfect injectors, injection pump, pump timing, batteries, starter, etc would progressively cause harder starting, and adding fuel and/or timing might help in some cases. I would think that it would be safe to add 10-20% fuel to that table in the temp ranges you are targeting and see what happens.

I will try to find some time in the near future to look at the code that deals with starting and work to expand the tables/scalars and documentation for them. Maybe then I can give some better suggestions, but keep in mind I'm not an experienced diesel tuner.

This is very accurate. Most cold start issues are due to injectors and pump wear. You can add pulse width and basic timing advance during cranking but you are just masking mechanical issues 99% of the time. Poor atomization from old injectors on these is usually the problem. And shoving more fuel in at 22:1 compression on a cold start doesn't fix it. If you have good parts and lowered compression, having to make changes is a different story.