Cummins N14 boosting the power/filter vac #'s

My old International didn't have a lot of engine monitoring gauges.Had a manual resetable vacuum indicator under the hood for the air cleaner.Had a pyrometer,(piston/exhaust temp),and the boost gauge.Whenever the boost,(and performance) started lacking,usually meant a load of bad fuel.Boost would fall to 30psi or less,just mean't the engine wasn't getting fuel,hence not spinning the turbo up to make boost.Change fuel filter,problems solved.In 45 years of trucking,my N-14 Celect was by far the best,most trouble free money making engine I ever owned.Sold it when I retired,had never been apart.

 

I thank 8 on that was considered in need if replacement for a fuel filter under load. Fuel lines or anything else causing that would also need correction. Are you sure it is not the computer fuel passages causing the restriction? An under sized fuel line will not cause that at idle.

 

Im not a cummins guy but ive heard those ecm cooling plates are notorious for getting plugged up on those n14s.

Also for fuel line feed i like #-12. But im sure -10 would suffice.

 

Not sure if they just replace the cooling plate or clean them.

All i know is it seems to be a common issue on those n14s.

Maybe just bypass it for a day and see if it makes a diffrence.?

Im sure now that weather is cooled off now should be able to do that just to try

 

Have seen guys run them by-passed for years.
Get some extra hoses. Connect the outlet to a hot water pressure washer. Hard piped without tip. Flush with soap, rinse, flush with fuel, reconnect.
Oh: I mean they must be replaced.