Re: CAT C9 Black Smoke - No Codes

check your atmospheric sensor or boost sensor is not clogged or wiring issue.


CAT C9 Black Smoke - No Codes

Hey Guys,


We have a CAT C9 in our game boat and have had a problem for ages which nobody can work out.


Black Smoke & low boost at 1120 revs - cannot get over 1400 revs, increased fuel rate. (Already changed HEUI and 6 Injectors - problem didnt change), swapped turbos, checked aftercooler, repaired exhaust elbow leak, swapped ECMs all the usual and cannot swap the problem.


We are not getting any codes at all? Has anyone else experienced a similar problem?


If it was injectors would you be likely to get a code?


Any help appeciated.