EFI Live OS flash to stock

[BlockerBoy]

I have a custom EFI OS and need to change to a 3 bar. I just installed a crate 6,2 and added a LSA. With the current tune that was on the truck when I bought it there is no option to change to 3bar. Do I need to have the computer flashed back by dealer or is there a way I can do it through HPT?

[mbray01]

Well that appears to be a 2.5 bar os, why cant you use this file. Are you planning on making more than 25 lbs of boost

i honestly like the efi live os's better, as it pulls timing in boost based on boost pressure, not air load.

Now if you insist on 3 bar specifically, id load an 02 camaro file in, then change to a 3 bar os.

But in my opinion, i'd leave it alone

[mbray01]

Plus all the segment stuff is done.

[BlockerBoy]

I definitely won’t be above 25psi I was just under the impression I needed the 3bar os for it to read the zl1 map sensor correctly. Truck fires up and shut back down immediately maybe just because tune is so out of wack since my whole setup has changed so drastically

[kevin87turbot]

You need to enter the ZL1 MAP sensor Linear and Offset values in your tune and you'll be good to go. 312.50 is linear, -11.25 is the offset.

Your tune is set for MAF only as it sits.

[BlockerBoy]

Ive changed some parameters based off a tune from the guy I bought the lsa from but cant flash them to the truck to try it out. I tuned my truck from my computer w a different MPVI2 while I was waiting on my pro version to come in. Now when I read the vehicle it doesn't give me option to licence it. When I try to flash it just says unlicensed vehicle but it doesn't give me the option to add credits. I'm not sure how to do that without being prompted to.

[BlockerBoy]

fuel and map tweak from jeffs.hpt

[cobaltssoverbooster]

i cant say ive seen an efi os upgrade in hpt. i like the table layout. Thanks for sharing your file.

[GMjunkie]

That is also the first time i have seen the EFI live os. Man if that had flex fuel i would be all over trying to get that os. Thanks for sharing.

[mbray01]

One other benefit of running the efi os is that you dont have to use a special 3 bar config in the scanner to be able to read it properly, it works with the regular config without issue, as well as using generic scanners as well