need some help

[00_Altima MD]

I moved this from the altima forum to here to see what you guys think, if you want to you can check it out to see what the original thing i put on there was, actually i will post it on here next

well i still have a lil bit of a problem...i replaced the fuel filter today and nothing has really changed, i havent picked up anything and i haven't really lost anything either. Also one other thing is that i dont really think that my computer is getting a full reading of the AIT b/c a long time ago i got this thing off of ebay and i wanted to see if it would work and i used electric tape to splice the thing in and see if it would help at all and i did and when i did it it worked for like the first couple days i got so much more out of it like my midrange was just nuts and then after a couple days it just stopped working and it was almost like it wasnt even connected on there before. Here is an example...

i go to the track with just the stillen 4:1 header and ngk iridium plugs on the stock wires and i run a 15.9 @ 86.3 mph and then i go back down there with nology wires put on and a new rotator clip as well as this lil chip that i got off ebay for like 15 bucks or something like that and this was after i had been driving it for a while with the thing on there and i get down there and the best that i can run is a 16.2 at like 83 mph and that is what i was running stock with 17" rims and not even lowered yet, well i was actually running that back in november of last year and that is what had happened, ask fred about what i ran ne ways that is basically what had happened over the past 6 months with my car and it has been running good on and off now and then and i am not for sure what the heck the problem is. I am going to take it down to a nissan dealer to hook it up to the console to see if it is retarding my timing at all and i am going to see if i can get the tech to advance it a little bit but if anyone has any ideas as to what i should do let me know