Factory flash

[grasshopper645]

Got a VZ SS ute (6L) and appears a previous owner has flashed some custom tune on it. From what I can tell its got no mods other than a cat back so I'm wanting to put it back to stock to hopefully improve the fuel consumption slightly.

Can I flash a factory calibration onto it using and MDI2 and TIS2WEB? Have heard some comments about TIS2web not allowing a flash if the ECU tables have been modified? is there any truth to this?

I guess i should take a backup of the tune incase there are other mods that I'm unaware of.

 

[Skylarking]

You sure there are no internal mods, maybe a different cam and rocker ratio while externals were all kept stock?

Can’t you contact the previous owner and ask what was done to it?

 

[harrop.senator]

Custom tunes are usually more economical then factory. How bad is the economy? Are the plugs fouled? Cleaned the mad? 02 sensors original?