Lean Cruise

[brandongarnold02]

Sounds like a bug: There should be no spikes even if there is communication problems.
If you want to help fixing this, enable debug log on patcher window, run log until you get this spike and send both: debug log & data log by email.
joukoy at gmail.com

I just sent you a debug log and a data log.

[joukoy]

I just sent you a debug log and a data log.

Thank you!

[joukoy]

I just sent you a debug log and a data log.

I can see from logfiles, you are using old version. Please download latest zip from github and try again, bug should be fixed already.

[ralmo94]

Brandongarnold02,
Where you ever able to verify fuel economy improvement with lean cruise?

[brandongarnold02]

Brandongarnold02,
Where you ever able to verify fuel economy improvement with lean cruise?

It actually seemed to decrease my in town fuel economy by about 3/4 of a gallon per mile. Went from 10.5 to 9.75. That’s with is leaning out to 16.5 to 1. Leaning out to a bit over 17 got me only 9.25 mpg. I turned off lean cruise and going to retest then may advance timing some after that and see if that increases fuel economy.

[ralmo94]

It actually seemed to decrease my in town fuel economy by about 3/4 of a gallon per mile. Went from 10.5 to 9.75. That’s with is leaning out to 16.5 to 1. Leaning out to a bit over 17 got me only 9.25 mpg. I turned off lean cruise and going to retest then may advance timing some after that and see if that increases fuel economy.

Is your tune spot on? Lt &St fuel trim within -5 to 0?
If so, I would try going a little richer about 15.8 and see what it does.
Spark definitely, there should be a segment to add or subtract acourding to fuel mixture.
Leaner mix needs more time to combust. If that's not already on I would definitely do that.

[brandongarnold02]

Is your tune spot on? Lt &St fuel trim within -5 to 0?
If so, I would try going a little richer about 15.8 and see what it does.
Spark definitely, there should be a segment to add or subtract acourding to fuel mixture.
Leaner mix needs more time to combust. If that's not already on I would definitely do that.

Yeah I fine tuned my maf and ve table a while back and got it within that window. There is a table that adds spark based off afr and I had it copied from the Holden file. No luck as of yet.

[ralmo94]

That table should add 0 for the 1 cell, then go up a couple degrees either side of it. I don't know how the xdf is defined, but in HP its the oposite of lambda.