99 rebuilt ISM misfire, black smoke, popping video inside

It was not. It had excessive blowby. So I rebuilt the motor. I unplug all injectors one at a time. absolutely nothing. Same ####.

 

May have to pull out a dial indicator and see if the cam is toast or something. Another thing I noticed on Cummins insight is my ambient temperature stays at 59 degrees. It was 80 degrees today in Georgia.

 

Yes I did do that. Same result. No change in anything just popping, smoking and miss firing. I did all cylinders like u said by leaving them unplugged. No change in anything

 

very minimal blowby. Engine was rebuilt. Doesn’t burn a drop of oil. Oil pressure at 20 at idle and around 40 to 45 1200 rpm and wot.

Truck always had a long start before rebuild and after rebuild. Never would start up right away. I’m still digging. Gotta be a mechanical issue?

 

I bought the truck needing a rebuild. So I don’t know what the ism is supposed to feel like. All I know is that it’s more powerful then my dt466e

also is possible that the mechanical part could be bad and electrical be good on an injector? My cooling fan was welded so it ran all the time. The short period of time I drove it it never got to operational temperature.