High LTFT at part throttle bank 2
High LTFT at part throttle bank 2 I brought my car out from hibernation. I am getting high like +30LTFT on bank 2. Idle is fine. At part throttle it sounds like a mis. Bad stumbling. I have a SD Tune. HP tuner and Torque bluetooth pcm reader. I pulled the plugs and will replace them. They are pretty carbon coated. All look the same. Have not changed in four or five years. NGK Iridiums. Fuel pressure is normal. SVO 40 injectors are all reading about 14.8 across. I tightened the pass header bolts. a few were a tad loose, but their was no carbon around the gaskets.
Any other suggestions. Bad gas? Car has not ever had an issue. Ran strong before she was put up.
Any other suggestions. Bad gas? Car has not ever had an issue. Ran strong before she was put up.
Teching In
Joined: Feb 2013
Posts: 12
Likes: 0
From: 15 Mins outside Boston
I would go ahead and look into the misfire first before trying to work the fuel trim. When a misfire occurs the 02 sensor picks up on the oxygen that was not used in combustion and give a lean reading and your fuel trim will go positive.
