[mattdev]

I just installed my FIC 650's and am having a hell of a time with my fuel trims. I am tuning w/ MAF-T.

Of course, you can't just set the MAF-T to 650cc, you have to richen it up. The MAF-T is set ALLL the way down to 470cc injectors ans will still read 7%!! I have heard of people setting 580cc settings for 650's, but 470 just seems way too low. I have worked my way down from the 650cc setting down to 470cc settings! From about 520cc setting and up and up my trims were pegged at 18% (leaned out to the max)

Any ideas? I will check for pre-o2 exhaust leaks in the A.M. I am running stock re-wired fuel pump, but shouldn't be a problem... What else could cause such a lean condition?!

EDIT: I brought the trims down to 0 and the Translator is set for 460cc injectors. My o2 voltage reads .78 and my wideband is reading a perfect 14.7 at cruise and a little more lean at idle (still 0% idle trim).

EDIT: More details that may help. My T-25 is days from going out, occasionaly blows oil and whines like a siren (don't worry I have a new 18g sitting in my apt.)