Ok so I just got some videos of Idle, driving normally , & a quick pull in 3rd. I've changed everything I can think of its not a leak so I am assuming I should hand this over to a tuner???

The car seems to run fine but I have noticed a reduction in performance & gas mileage as well.

IDLE:

Driving:
https://www.youtube.com/watch?v=JQOX8i9zV8I

Acceleration 3rd gear:
https://www.youtube.com/watch?v=RfUx-7HjYE8

 

Videos Added

 

What are your fuel trims, idle looks a little rich but not to enough to be a problem.

 

Stock* assuming that the previous owner said it was tuned by Al @ dynoflash but all the table looked identical to my stock 03.
I've only adjusted for boost cut & simple things, not fuel or timing has been changed.

The Video didn't catch the jump to 17 @ idle It only happens for a split second or 2. or when it drops to 11-12 the car sounds like its bogging down bad.

What do you suggest the fuel trims be at? & which tables do I need to post?

 

You don't set fuel trims, they indicate if the computer is compensating to lean or richen the fuel mixture.

 

... that's if we believe his gauge is 100% accurate without any exhaust leaks.

I couldn't tell by the vids what your main concerns are.

Idle seemed pretty normal by its consistency, I'm guessing its not 100% accurate... driving off throttle seems like it doesn't go into fuel cut quick enough but its hard to tell without some logs

 

Yeah, I'm trying to get some logs my laptop crashed so I'm waiting on the new HD in the mail. No exhaust components where changed since the WB was installed only difference was the EGR delete was the last thing I did. I've trippled checked it & It's 100% sealed. I rechecked the calibration because I thought it might have been off, but even after resetting it. Same outcome , The car feels sluggish, I'm trying to figure if i need to get this tuned or if I could just change a few things myself to get the a/f up a bit leaner.

The thing is I've noticed it go from a healthy 14.7 idle, no bogging down. a nice pull throughout the power-band.
to the car feeling like its running in limp mode, but of course its not... I'll check the down-pipe that's the only part that the wide-band is on so it would be the donut gasket on the o2housing if there is a leak....

Cars getting 196mpg on a full tank... which my last evo with 1000cc got almost 240 on a full tank... It's just wasting fuel badly & causing very noticeable reduced performance

 

Did you do any maintenece checks like boost leaks and stuff?
When was your spark plugs changed last?... you know stuff like that.

 

Are you on stock injectors? As mentioned, fuel trims would be good to have, could point us towards the problem.

 

Just changed them again Sunday, one plug on cyl 4 was kinda nasty...

Boost leak checked up to 30psi no leaks, & i just got under the car to check if one of the o2 sensor plugs came out but everything is all tight.

I'm assuming the egr removal needed to be compensated in the tuning...?

Yes stock injectors, I'm trying to get my friend that has Evoscan on his gsx to swing by so I can get some logs going on this thing. I recalibrated the WB again this morning & its still the same outcome.