smp566 Posted July 8, 2011 Share Posted July 8, 2011 Hello Everyone , I just bought a Mack CH 427 electronic pump V Mack 1996, now they truck ran fine taking it home , no problems, let it cool down, then shut truck off,,, came back out after a bit , started it up and she is blowing all kinds of black smoke out , went to shut truck off and she will not shut off with the key , had to pop the clutch and stall it to get it to turn off, Iam new to the Macks but I ve been a Mechanic for Years, Need some help on this though Anyone have any Suggestions!!!!!!! Tks Shawn Quote Link to comment https://www.bigmacktrucks.com/topic/19695-ch-427-black-smoke-and-wont-shutdown/ Share on other sites More sharing options...
theakerstwo Posted July 9, 2011 Share Posted July 9, 2011 I would not try to start untill i had a mack mechanic check it out. Sounds like it has stuck a barrel and plunger while in full fuel position. It may not but if you dont know mack engines you dont want to learn on this one. Who ever starts it need a choke plat and intake off down to the metal side of the intake of the turbo. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/19695-ch-427-black-smoke-and-wont-shutdown/#findComment-81372 Share on other sites More sharing options...
fjh Posted July 9, 2011 Share Posted July 9, 2011 I would not try to start untill i had a mack mechanic check it out. Sounds like it has stuck a barrel and plunger while in full fuel position. It may not but if you dont know mack engines you dont want to learn on this one. Who ever starts it need a choke plat and intake off down to the metal side of the intake of the turbo.I would check out the turbo seeif it didn't creater on the way home! Quote Link to comment https://www.bigmacktrucks.com/topic/19695-ch-427-black-smoke-and-wont-shutdown/#findComment-81382 Share on other sites More sharing options...
SaskShark Posted July 31, 2011 Share Posted July 31, 2011 check the wiring to the shut off solenoid. I dont know Mack that well but I am an experienced truck mechanic and that would be the first place I would look. Quote Link to comment https://www.bigmacktrucks.com/topic/19695-ch-427-black-smoke-and-wont-shutdown/#findComment-82792 Share on other sites More sharing options...
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