rags

Hi Everyone,

I just purchased a hybrid that has a 99 LS1 in it that has been modded. The car does pull well but leaves a lot to be desired with the way it idles. Being new the LS1, GM ECU and EFILive software that came with the car, I'm looking for a place to start. The mods that I have identified/been told about are Absolute Speed Stage 2 5.3 heads, TR230 cam, Fast 90mm intake & TB, Sanderson 1 3/4 block huggers, 2.5" exhaust up to the Y then 3" to the back of the car. The car came with another ECU which looks also to have been modded as it has a cable coming out of it with a switch wired into it. What I'd like to know is should I attempt to reload factory settings before trying to adjust the idle situation? Is that even possible? Which ECU should I be working with? I can get ID numbers off of each and post here if that will help.

Oh and BTW, I have tuned before but my other car has an Electromotive DFI. This will be the first time attempting to mod a factory ECU.

Any help is greatly appreciated.

Joe

stevied916

iTrader: (30)

Find the original tune on holden.

-Open tune which is on car in efilive
-Click load with alternate comparison and load original tune.
-Click compare tunes
-A table will pop up with what has been changes between the tunes.

rags

Thanks Steve. I did find the list for stock tunes but I still have a question. Is there a list somewhere that identifies what ECU came from what car so I am sure to be downloading the correct file? I'll go back to searching.

Joe

stevied916

iTrader: (30)

If you download the tune off the car it will say what OS it is running in the screen

rags

Thanks again!