#50419, "backfiring problem and spark plug pics(56k warn)"
ok since i put in my new o2(2 days ago) the car has been running pretty good. i had to retune it though, and my idle fp's are down to around 21psi at idle where w/ the old o2 it needed to be at least 24psi. anyway, even at 21psi my ltft is close to -25 most of the time, however my o2 readings at WOT are only at .92 and sometimes lower. that reading is according to my datalogger. according to my o2 gauge, the volts are at .95ish at WOT, so i don't know what to believe, b/c my fuel trims are pretty leaned out. anyway, just yesterday i started getting little backfires during deceleration. it was never a smooth sound, but now there are noticeable pops and sometimes rather loud ones. i figured it was my plugs and changed them, but it still does it. what could it be? is it possible that i'm still running really rich? or could i be running very very lean? my fuel trims and o2 volts are contradicting. my egts seems ok, i get close to 800C on 3rd gear pulls, but don't get any detonation. looking at my plugs though, i don't think i'm running extremely rich, b/c the tips are definitely not black. the white color of them actually scares me a little. it looks like im' running very hot. how do u guys think they look?
