Great minds think alike.......JK! We were all over this thing at once, heck I was just about to attrach a modified tune, but you beat me to it again!!! DAMNIT!

 

I asked about having a class in Florida... EFI University doesn't have any shops that they work with down there, so it would make that difficult.

Justin

 

 

Wow, comparing tunes (not that I don't trust you) there is a big difference in the graphs. Any idea why it would be commanded so lean?

 

I dunno, but anything over like mid-15's is really lean IMO, especially on a cold motor. Lean cruise is one thing, but trying to warm it up to get to temp is another. Just not enough fuel for it.

 

It was lean because of the file that I attached for you. It was in EQ ratio where 1.0 = stoich. > 1 = rich, < 1 = lean.

Your software is set up to view in Lambda where 1.0 = stoich, <1 = rich and > 1 = lean

Backwards... Multiple lambda by 14.7 to get AFR
Divide 14.7 by EQ ratio to get AFR

 

But, it was commanding way lean before you ever touched it.

I really never noticed before because when it was cold outside I would start my truck 10 minutes before I drove it to let the heat get going and get it up to operating temp. I never beat on it when it's cold because of the dual springs either.
Gonna go load and take a quick ride. Back in 15.

 

It wasn't commanding lean before, it was just getting lean because of fuel puddling in the intake tract. Occurs a lot more readily when the engine is cold.

 

Heres the latest log. 2 minutes old. Still stumbling but I think it's headed in the right direction....

 

My tuner is about to move into his brand new building. He uses EFI. His name is John Weeks. He posts alot on Tech. Not a sponsor (yet) so I won't post the link.
I could ask if hes interested.