Hi Guys,

New to this site, and new to turbo cars - please go easy!!!!

I've been running around on a custom tune on a BA MkII Xr6T for a while, but need to get it services (75000ks) next week. So I attemped to flash it back to stndard/factory last night.

The program seemed to upload without error messages, but when I started the car it coughed and spluttered, didn't rev and seemed to be overfuelling and generally wouldn't run.

Flashed it back to the custom tune and all seemed normal again.

Edit: More info

Custom tune is ~320rwk on 98octane

Car Mods - injectors, nizpro 1+ kit with cooler

The o2 sensor is disconected with the custom tune, woudld this cause this problem if left disconected for the factory tune??

Any help is appreciated...

Cheers

Dave.

Edited February 24, 201016 yr by daves3

That could be your problem as on the std tune the ecu will use the o2 sensor to measure the richness or leanness of the air/fuel mixture. Maybe try plugging it in and reflashing.

Yep thanks, that was the plan for tonight.

Any other suggestions?

I realise the info is a bit limited...

Running the stock tune with larger injectors will cause rough running.

Thanks, though seemed to be much more than just rough running???

Yep the factory tune won't run properly with bigger injectors.

geez your lucky the car even started with big injectors

Cool.

Sounds like that's the issue....

not sound like your issue.... it is your issue..lol

good power to mod ratio btw