k i have a friend with the above van...........he has done all the things they say to do with Dirty MAF sensor, Vacuum hoses, PCV valve, Cracked PCV Hose. these all check out
P0171 & P0174 the MAF has the correct voltage, there are no leaks in the system, changed all filters & fluids.
the #'s he has says it should run like Crapola, but doesn't.
the ONLY thing that he did do was run 2 yr old gas thru it, he was curious if running injector cleaner would help to clean things up.
other then that is there SOMETHING we are missing that someone has come across after having the same codes.
btw, no other codes present & he can't smog this thing with the SES on
thanks in advance.
if there is anything I forgot to address let me know. we were up late working on this thing so my brain is dead..........er