A little tune help please! I need to lean out a little

[Crowhater]

The tune I am currently running is attached below. when I pull my boat or just driving down the road I blow to much smoke in 5th or 6th. My 6th gear rpm range cruising down the road is 1500-1600, so if you roll into the pedal she starts puking a cloud of black smoke. If I don't down shift to bring the Rpms up I will cover traffic with Coal smoke. What do I need to tweak to lean this out?


LBZ
No EGR
PPE fuel rail with dead head plug
Fast 150 lift pump
built trans, billet converter
4" strait exhaust

17495

[Mitco39]

B0797 - you could turn that on and it would give you control of the smoke limiting tables to dial out the smoke as needed. Or pull PW from your main injection pulse from 40-100mm3

[Crowhater]

This is what it is set at now

17496

[Mitco39]

Yeah you got to lower B0797 so that it allows the truck to monitor your AFRs (which should work, dunnow cant say Ive actually played with it myself). I usually just tweak other areas of the tune to cut on smoke.

[Crowhater]

Gotcha, now I need to figure out how to do it.

[Dmaxink]

Add more boost in a linearizing flashion into the rpm/mm3 area that the truck is smoking. This will add air into the mix and help clean up the smoke.

Messing with the lean/rich parameters will not grant you the results your looking for. I suggest logging the problematic area and adding in more boost. Too much desired boost will set a under boost code if actual can't meet your command.

Good luck!
-kory

[Crowhater]

Dmaxinc, I am still a novice to Efi can you help walk me through this procedure? Without much tune time on my new LBZ Duramax engine I would worry to death that I did something wrong and I am hurting it. The tune I am running is a 180hp but it needs some tweaking for sure.

PS: the boat I haul is not very heavy ( 21' Flatscat ) boat and trailer are maybe 3500#

[Dmaxink]

First step is get rid of the 180hp tune wherever it came from and start with a stock tune and make small changes

[asmithIII]

Made a few changes.

Let me know if this is helpful.

[blklmm]

Where did that tune come from?

[KB3MMX]

Add more boost in a linearizing flashion into the rpm/mm3 area that the truck is smoking. This will add air into the mix and help clean up the smoke.

Messing with the lean/rich parameters will not grant you the results your looking for. I suggest logging the problematic area and adding in more boost. Too much desired boost will set a under boost code if actual can't meet your command.

Good luck!
-kory

I agree with Kory, air is going to be your friend.

At 100mm3 and 2800rpm with a tune fueled that hard, you should have the desired boost in the 47 psi area(to achieve about 32psi actual) and carry it the whole way to the end of the table(4800).
Right now, your desired boost slumps past 2800 rpm and is set to only achieve about 30 PSI(45 minus 14.7psi atmospheric).

From 1400-1700RPM/30-80mm3(and up) in the desired boost table, raise your boost values slowly until you have less smoke and better response for towing. Mind you, when raising desired boost, the computer will throw more vane in.... and if you go too high, it won't be able to satisfy the desired value, thus tripping an underboost code as Kory warned.

You should also look at your splits and work on them, that'll help clean up the combustion too.