Originally Posted by
soundengineer
also a quick question....then I have your answer
are you still using the MAF at all? is it enabled or disabled?
now your answer
when your trims are enabled....they are most likely trimming because of a lean condition(positive trims)
because of this...WOT follows triming that happens just before you go into PE
so your car is trimming because of lean and carrying over to WOT...
this is normal
what it means is that you need to retune your VE/MAF so that the trims are slightly negative so that it doesnt carry over into WOT/PE mode
our cars always add fuel if trims are positive, but never take away fuel if trims are negative.
2nd issue....
just because you tune in open loop with trims off...doesnt mean your trims and your wideband line up
only way to check is to have both going at the same time...
which means you need 2 bungs in a similar location.
get a second bung welded into one of your exhaust primaries..its usually about $25-$40 at any reputable exhaust shop.
then you can check one against the other...
I can guarantee that more than likely your wideband and narrowband o2's wont show exactly the same thing if you are having the issues you stated above by the methods you have used to tune part throttle....because if they did, you wouldnt be having this trimming issue.
at 14.7AFR 4% = .588afr
so if your trims are 4% you will see14.1ish at cruise or 15.2ish at cruise on your wideband
also...the reason I asked about the MAF...at WOT...above 4k your car goes to 100% MAF if its still working....
and below 4k the car will use a blend of VE and MAF when it is still enabled
which means your problem could be in the MAF if its not diabled/removed