Hi guys, I figured I'd try this forum out as there are probably more people familiar with logging than the other F-150 forums I'm on.
I've been chasing this issue long enough to enlist some more brains on the issue. Since installing my new shortblock, my tuner and I have been chasing the cause of my truck pulling fuel pretty much constantly. LTFT's are .85 and .89 for bank 1 and 2 respectively. The truck has catless downpipes, an AFE intake, pocket ported heads for performance mods. It also got new OEM injectors and SP534's, and I just put in new Bosch primary O2's. It runs great - no issues there, however we're concerned as to why it's pulling fuel all the time with my minimal mods.
For those familiar - negative LTFT's are kind of odd as there are fewer variables that would cause a vehicle to pull fuel than there are for one to add (eg. vacuum leak) There are no exhaust leaks, but the downpipes are stock with the cats cut out professionally.
If anyone has logs of their stockish trucks laying around they'd care to glaze over or share, I'd appreciate it very much. I also have tons of logs under various conditions if anyone would like to take a look as well.
Thanks in advance for your feedback.