Reply to thread

Message: <blockquote data-quote="Unclebob" data-source="post: 1509187" data-attributes="member: 29596">Hey guys!I'm new here - and more or less, a "new" owner of a 95 Mustang V6.I already went through a lot of threads looking for a solution (or maybe even a hint) on the probs i got with my pony.At this point, i'm sorry for the long text.And also sorry for probably having a strange way of punctuation and spelling - i'm not a native speaker <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" />The problem itself seem to be pretty easy:while idling, rpms around 700, Short-term fuel-trim is around 7.5-8%, which seems ok.Long-term fuel-trim skyrockets up to 25%. It idles a little rough, but nothing thats really bothering imo.As far as i know, the closer both get to 0%, the better. but stft+ltft <10% is ok, which is not the case.As soon as i rev the engine, ltft drops to round about 3%, stft,depending on how much i hit the pedal, oscillates between 10-17%, which seems fine to me tbh.CEL pops up every now and then, throwing p0171 and p0174 codes (Bank1 and Bank2 running lean).Most of the time those are symptoms for a vacuum leak, but sadly not in my case.Things already done / checked:- standard maintenance (sparkplugs, air-/ fuelfilter, oilchange including oil, transmission-oil + filter)- intake-manifold gaskets (lower + plenum gasket)- Vac-hoses replaced (every single one, except the one dissappearing in the fender)- IAC (incl. gasket) replaced- egr (incl. gasket) replaced- o2 sensors (up + downstream) replaced- maf-sensor replaced- throttle-body cleaned, just in case it gets stuck open a littleI'm kinda running out of ideas tbh, maybe anyone has had that kind of problem and might help or lead me to the things i'm overlooking.Greetings from good ol' Germany!</blockquote>