alrite guys, quick question, i already searched a bunch about the whole system to lean code(p0171) i believe thats the number, neways, i replaced sparks plugs thinkin that may be the intial, well the only problem i found at all when i replaced them is they were quite loose and not tighten down very well into the head, so i tighten them, cleared the code, and every couple days it will come back on for no reason? the other issue is between shifts at WOT the car with break up a bit the go, and through the entire rpm band it will b fine, only time it breaks up is between wot shifts, and i noticed today that in between shifts it blew a small cloud of black smoke? yall think it may b goin rich in between? ne help would b great

 

sumone has to of had this issue before? come on guys

 

Mods?

What kind of DV/BOV are you using?

Tune? Mods since the tune?

 

tune was done by tscomp, so i knw its nothin bad on that end, was fine during tuning stage and even when we finished, just recently started

 

If your getting the system lean code, that means your injectors are not scaled correctly and your fuel trims are outta wack.

 

its weird cuz it just started recently happening...ill talk to my tuner and see what he has to say, thanks for the input