855 no boost. No power

Hi what is

 

Hi which one off this Big cam is considered good engine I have freighliner with tag at the door for 444 xt but I also have tag at the engine for 350 and I believe I have the low flow and so many issues

 

This is the Afc diaphragm on backside of pump against engine block. A 5/16 or 3/8 hard line goes into it from aftercooler. The rubber diapragm well shrink and leak do to the ULSD fuels used today.

 

The aneroid screw that controls it is here

 

Those old 350’s only had around 1050-1100 ft lbs of tourque at 1600 rpm. 350 hp at 2100 unless it was a Formula than it was at 1950 rpm. Operating range 1600-2100 rpm. 28 lbs max of manifold pressure is normal. The old gauges would only go to 30 and never peg. Fuel psi at rail could be anywhere depending on cpl from 180 to 240. Fuel mileage problems may be due to wrong injectors installed at one time or injectors need clean and calibration. Oil in the intake sounds like bad turbo at one time and intake and after cooler not claened out very good.

 

This is picture from my pump I never see line from the aftercooler connect at this afc or do I need to be under to see it?

 

The lower torque ratings is the main reason why all the older trucks would use 4.11,4.33,4.44,4.88 rears with 13’s to pull the grades and to just not work the engine so hard to maintain speeds. 3:55’s and 3.90’s will work but if you are used to the big modern torque you will always think you are under powered.

 

That is what I fell lot power and torque at low gears and slow and low power at high gears