ok so here it goes, about 2 months ago my IPDM module failed had to replace it, hasn't been getting very good gas milage since. Before I got about 320 to 350 a tank, and now its about 250 to 270 a tank. So I took it to the stealership to have them run a diagnostic on it to see if it threw any codes, checking for the dreaded catalytic conv. issue, nothing no codes nada. so my question is this, could my MAF sensor be giving me problems and malfunctioning, could it be not working correctly and be giving me poor milage. Please!!!!! help!!!!!!