My truck "Vibrates, Shudders in Overdrive
I have an 02' Lincoln Blackwood, (same drivetrain as the Navigator), with 23000 original miles. I recently have had problems with the truck, at fairly regular times but not always, vibrating as I accelerate from 45-50 MPH when it goes into overdrive. It does eventually stop vibrating after a while as I get to higher speeds. It will also tremble as I go up very steep hills at lower speeds of 25-35 MPH. If I drop out of overdrive into 3rd on flat land, it will stop shuddering, (it's as if I'm going over small ripples's in the pavement), or if I'm going up a steep hill, I have to drop it into 2nd for the hesitation to stop. Engine light code of P0174 comes up, ("System too Lean (Bank 2). My guess is that I have a partially clogged injector. Any input would be greatly appreciated, before I take my rig into the "Stealershiup".