It's generally about 2 minutes after reflashing that the LTFTs come back in. Unless the PCM is being stubborn, which I have seen.
Good to know in case this issue ever happens to me.

I don't understand why so many people have issues with the LTFT. I don't have them off on my car(MAF only), have 14* of overlap, and have no issues with carry over into WOT(still getting exactly what I'm commanding), not to mention I have no issues with idle quality, low speed in parking lots, or hanging idle/surging.

Like it's been said though, there's more than one way to tune a car, and multiple ways seem to work just fine.

 

Watch gen3 computers on any closed loop startup (or open loop for that matter if you have stfts on) and ill guarantee you youll see something happen at exactly 100 seconds of engine run time. Just let it sit and idle or drive it. Itll happen either way. I cannot tell you if it happens when you turn both off and use a wideband though.
I have never had ltft issues either. And I've tuned cars with some large overlap as well.

 

It seems that so many people like SD because there are other issues at hand. SD will mask them unlike MAF. Both ways will land you the same result as long as they are done right. There are some limitations to MAF, but most street cars won't max their MAF out, and I have yet to run into issues with reversion.

 

Thats the issue usually, they arent done right and then blame it on the MAF or blame it on being SD. I tell people all the time that they cant tell if I turn the MAF off or on by just driving.

 

totally discouraged. LTFTs back to all 0s after 1 day.

 

Have you had anyone else look at he tune? Can you email me the tune, I'll take a look at it? Do you have any logs? My email is in signature below.

 

I put a whole new ECU in the car and modified the stock flash instead of applying any existing flash file I have. A few days and like 6-8 runs later, I still have LTFTs so that's good. I also replaced my 60lb Dekas with 42lb Deatschwerks injectors. I think I have the right info in the tune for them.

With LTFTs to use with the STFTs, I'm now tweaking the VE table to try to get fuel trims where they should be. Any thoughts on the attached?

 

Just looking at it, with no knowledge of anything but my own tune on a 2000 LS1, your minimum learn is set to 200%. Valve needs to move 200% to update? Mine is at 4% from factory.

 

thanks for the comment, I'll take a look at the fuel trim learn "level". I guess 200% was a leftover setting that would prevent the system from learning by itself while I'm manually "learning it" using LTFT and STFTs

BTW, I changed that 200% to 10% and my STFTs and LTFTs went to -100 across the board, so I re-set it to 200%... And looked at a stock tune for my car and it's 200% there

 

That is a normal parameter. You will see that on hundreds upon hundreds of stock files.