Alright let me start out by saying I am a newbie and all this and trying to take my time learning. So far everything has been going decent (I think), I have been following the sd tune guide in the hp tuners help section and also have been using this guide here http://www.michigansnowmobiler.com/h...ons%20rev2.pdf.
My car is a completely stock 2004 GTO M6, The only "mod" to the car is a k&n drop in factory replacement filter the PO put in. I started by doing the VE table like the guide said, After a few logs and changes I realized that adding 15% to the VE table to start was a bit much since this was a stock car. I tried logging with the completely stock VE table and it was very lean. I then added 5% across the board to the stock VE table and that got it very close. I tuned the VE as close as I could get it, Mainly -2 and -3 through out with a decent amount of 0s, and from that point it seemed like any change made it worse. I also found out that my car seemed to hate the table being smoothed (probably me not doing something right) But table looks close to the stock table in terms of smoothness.
After I got it close as I could I moved to maf tuning. I followed the steps in the HP tuners help guide first, Upon starting the car the afr was very high, Like 16-17 at idle and slightly higher while cruising. (I didn't drive far like this, didn't want to risk damage to the engine). So I came back and tried using the second guides method of tuning in maf only mode, this gave the exact same result. Very high afr at idle and cruise. I ended up adding 15% to the entire table to get it to be in the -2 to -4 range just so I felt comfortable logging it in the first place. That is where I am now.
My question is this, First Am I doing this right so far? Second, Should the factory tables be that far off on a stock car? Third, Could the k&n drop in really flow THAT much more then a stock filter to cause this or is there something else causing the factory tables to be off?
Just to add, When I first got HP Tuners I did some logs messing around with it to get the hang of the scanner and what not and on my test logs I saw my LTFTs go from 5% all the way up to 16% at some points. Those numbers were seen on the car running the completely stock tune and nothing changed.
Thanks in advance for any replies, I can post my stock tune and the one I am currently using if needed.