1999 d12 ecu problem

yeah my truck is 05 with egr but fuel pressure is 1.8 bar (around 220 kPa) dealer says its normal but every other truck with D12 I compared had min of 3 bars at idle.. tomorrow I'm putting new fuel pump to see if it helps..

 

it seems like it has misfire, there are no error codes on dash,
makes +/- 4.6 mpg locally and has very slow response to gas pedal compared to other "same" trucks
lacks power as well

engine harness is new, boost pressure sensor is new, I just did engine overhaul, replaced 2 injectors, 2 timing sensors, flashed ECU to the newest version
installed new fuel lines and fuel/water separator.. didnt help

I replaced fuel pump once but for the used one.. now it gets lower fuel pressure than it had before and it feels like misfire is "bigger" it might be my mind playing tricks on me but tomorrow I will see if it really was fuel pump

 

forgot to mention that head was rebuild as well

 

didn't help now pressure is 3.2 bar and truck still runs like sh..

 

Did you just disconnect the air line from the EPG or replace the whole thing?

 

gas pedal sensor you can check with vcads I believe vss sensor as well..
have you seen previous post

http://www.thetruckersreport.com/tr...o-forum/181114-mid-128-sid-231-fm2-error.html

Pablo really knows this trucks and I think you should ask him about your problem..

I didnt have a chance to check my truck with vcads yet, my guy with computer is on vacation but vss sensor is next thing im thinking of