when you did the exhausts, did you do anything w/ the turbo down pipe? also, disconnect the exhaust back pressure valve...........
downpipe was changed to a 3" 2 piece mandrel bent pipe, And when you say disconnect the backpressure valve... what do you mean? like just unplug it?
First off how many miles? when was the last oil change (this affects more than you would ever believe)? hows the air filter look? Did you change the fuel filter?? As mentioned before the Fuel Pressure Regulator Screen needs cleaned. Do you have a way to check fuel pressure? these trucks lose fuel pressure over time being all mechanical systems
These trucks wont smoke much even tuned so I wouldnt be using that as a reference point.
it has about 320K km's, i checked the blowby on the motor and it is very little at all, the way things are or were setup i'd almost believe motor was replaced at some point... especially for such little blowby for the kms... we just changed the oil ~200 kms ago, new fuel filter, oil filter, and transmission oil too. but the fpr screen, i am not too sure on that one, is it a small screen on the side of where the fuel filter sits, theres a hole and a small screen where that other thing on the side connects? (sorry for lack of words not too sure what to call them)
Originally Posted by Justin@DP-Tuner
Check for boost and drive pressure(up-pipes) leaks. That is the most common problem for a lack of power. Once you confirm that everything checks out in that section, you can do more diagnostics involving ICP, and the rest of the sensors on the engine.
whats best way to check for boost? i guess a boost gauge, but aside that? because boost only seems to actually hit or hit hard at about 3000 rpm which seems really high to me (or by the sound of the turbo anyways)
i would also clean the fpr screen
we had the fuel filter manager and all that area off, because the mechanical pump was spitting out diesel, so not sure what screen you are referring to if its the little one that goes into where the fuel filter goes, then that is clean