WebCummins STC – Step Timing Control In 1986 Cummins introduced Step Timing Control to the PT fuel system. These systems provided the following advantages: y Reduced start-up and cold weather white smoke y Improved idle characteristics y Improved light load fuel economy y Reduced injector tip/cup carboning The STC system was used primarily to … WebMar 25, 2010 · The second was STC (Step Timing Control). Both were very effective at eliminating light load/idle smoke. ... the 1974 370 cummins engine.Might run the rack & check the settings close as if they are a little loose the engine will smoke white .And yes as other members have said some older cummins 855's like to to smoke at idle.As far as …
Cummins Big Cam Smoking Issues The Diesel Garage
WebNov 30, 2014 · Nov 26, 2014. #1. Hi really need some help with my cummins engine. I have 1978 855 NTC that is smoking badly, the truck overheated and was blowing heavy white smoke, so I took apart the top of the engine and had the heads checked. The three head gaskets looked ok not blown through. sent heads out supposedly pressure tested one … WebNov 11, 2012 · hi i have a n14 cummins celect plus and its smoking all the time on idle an when i drive i put 6 new injector new turbo put 2 piston whit 1 head , sleeve all crank bearing and rod are replace put new cam sensor new radiator air to air and it still smokking excessive i have know idea what causing that idle is a letle ruff butt he have good power … devonshire lane harrogate
I am working on 1990 L-10 cummins that has excess …
WebApr 25, 2024 · If there is the STC control is bad and needs replacement. The STC system operates off engine oil pressure to advance and retard injector timing, internal oil leakage … May 25, 2013 · WebFeb 7, 2015 · White smoke--raw, unburned fuel. Essentially fuel vapor coming out the exhaust. Can clue in to improper timing, low compression, or extremely excessive fuel … churchill\u0027s family tree