Re: P0171 and P0174, base engine
From a Mercedes site
Torque pro values 154f coolant 800 rpm engine cover removed. Idle is smooth and revs nicely.
Intake in/hg 20.6 - 10 psi
rail fuel pressure 57psi
MAF 3.9 & raises with rpm - is this about right ?
all rubber feels good.
Long term fuel adjustment -9 bank 1 and -12 bank 2
O2 Bank 1-1 and bank 2-1 both transitioning.
Guess I'll try swapping the MAF though readings seem good. Been going on for quite a while just keep resetting then 50-100 miles later comes back.
Last edited by Padgett; Feb 24, 2020 at 02:47 PM.