fuel trim question

im working on my fuel trims. i logged them and made changes to the VE table. drove 30mins logging again and made changes. i got them between -5 to +5.

the car seems a bit down on power. i know it takes a while for changes to take effect, but would it affect the power that much? its not too bad but noticeable. its idleing well.

also i only have a wideband lc-1 with gauge. i read about WOT tuning. do you have to have the pro interface to tune that or can i just judge by my wb? how does that work?

you can log your WB if you use the a/c pressure switch as the input. without the pro interface its the only way to use the scanner in conjunction with the WB efficiently.

also was your car previously tuned. what changes were made. correcting fuel trims shouldnt negatively effect power.

most people will ask for a tune and a log file and sometimes a config file, so be prepared to provide them for the best help.