Flashed over the tephra rom today and changed the immobilized it seems a little slower than my stock rom...

Why is that it would usually pull hard but with this rom it's like driving my turbo lancer again and it's slow

My stock Ron is not modded

I currently have cams, injen piping, o2 housing, and 3" exhaust

 

Here's The rom I'd I'm using 94170715

 

A) where did you get the rom from?
B) did you even check the map differences? (Ecuflash can show you the differences)
C) try copying your stock maps over

Hope that sheds some light

 

now that you have reflashed with apparently some random ROM image, have you tuned the car?

even if you took your old tune and translated it to the latest tephra mod, you still need a tune to get the cars potential.

 

Got the rom here
No differences except fuel and timing
I tried that but my car was making a on and off humming noise not sure why so I left change back to the tephra timing and fuel

I haven't tuned my car yet in the progress the timing seems to be the same for both Roms I guess I'll have to wait and tune it then