6.5 diesel .xdf and adx

**newellshk** · 04-21-2017

Absolutely. I wasn't implying you should disabled the SES light, only that on some masks you can choose which codes cause it to light up. In this case that wasn't an option. Regardless the solution I came up with should disable it completely. Just make sure the value of those scalars is 4C, otherwise the code layout is different and I'll need your bin to find the correct address, but I think it should be correct already.

**ohminen** · 04-24-2017

Just got one power bin file to observe. It has a lot of changes compared to BPDP file. Almost everything is changed. Have not tried it yet.
I was told it has non steady Idle.
Any interest to study it?

**ohminen** · 04-24-2017

And here is the bin

**newellshk** · 04-24-2017

Not much difference between that bin and stock BPBS.

The speed governor has been bumped to 98 MPH from 85 (with power restore at 96 vs original 83).
The Fuel Reduction RPM vs CTS table is slightly reduced, but that will only have an effect as the engine temp rises over 210F.
Desired Idle is lowered from 600 to 562.5 RPM when coolant temp is between 175-218F (blended in between 132-261F).
Then there are a bunch of trans pressure differences. It looks like the trans pressure vs temp tables are a bit higher and the base pressures a bit lower, so net affect probably not too significant. Those are probably just different factory calibrations.

**ohminen** · 04-25-2017

Thank you for the fast analyze. Hope I have some time to test it soon. What were the BPBS specs?

**newellshk** · 04-25-2017

BPBS is available here: http://www.diesel.dripspeed.com/bcc.php

If you click the BPBS link on the left it shows information about that truck. The right side is a link to download the bin.

**ohminen** · 04-25-2017

At last got the BPBS-ish bin to the car. You were right, not much difference. Also tested one from dripspeed via this old link: http://www.dripspeed.com/6.5/BIN/
Nice to see he has newer site too :) Next more fuel & harder shifts. I am gonna try to increase base fuel chart first. By the way: Lot of snow in Finland right now :/

**brian617** · 04-25-2017

Originally Posted by newellshk

Absolutely. I wasn't implying you should disabled the SES light, only that on some masks you can choose which codes cause it to light up. In this case that wasn't an option. Regardless the solution I came up with should disable it completely. Just make sure the value of those scalars is 4C, otherwise the code layout is different and I'll need your bin to find the correct address, but I think it should be correct already.

Set both scalars from 4C to 01, 17 goes away and stays gone, 18 came back.

**newellshk** · 04-25-2017

Okay, I looked again and there are two places, each with it's own counter, where DTC 18 is set. I added another entry in the xdf where you make the same 4C -> 01 change and hopefully this time the code will stay gone.

**ohminen** · 04-26-2017

Originally Posted by newellshk

Okay, I looked again and there are two places, each with it's own counter, where DTC 18 is set. I added another entry in the xdf where you make the same 4C -> 01 change and hopefully this time the code will stay gone.

Lots of progress in xdf file. Thank you very very much. I would like to tune warm starting faster. There is cranking fuel RPM? vs. CTS map.
Good suggestions what to change?

**newellshk** · 04-27-2017

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** · 04-30-2017

Originally Posted by 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.

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** · 04-30-2017

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.

**quadstar87** · 07-13-2017

Originally Posted by 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.

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.

**brian617** · 04-26-2017

Originally Posted by newellshk

Okay, I looked again and there are two places, each with it's own counter, where DTC 18 is set. I added another entry in the xdf where you make the same 4C -> 01 change and hopefully this time the code will stay gone.

That did the trick, thanks again!

For anyone with a manual DB2 pump conversion I'm almost done nailing the shift table to fix the erratic shifts caused by the conversion. Will post .bin when I'm confident in it.