series 60 black smoke

Hi everyone,

I am doing a little research for a problem I have with my 98 international 9400 with DD Series 60 DDEC 4.

My driver went off to the mechanic to get the truck safetied. I then get a call that after leaving the mechanics the truck is running rough and throwing no codes. After popping by the see my rig at the mecahnics I noticed a good amount of black smoke puffing out the tail pipe and refused to believe the issue was ECU related or had anything to do with the return line check valve at the back of the head.

So up to now I have replaced the injector harness as I believe I was getting a short in the wires. plus wires at the ECU were damaged. I replaced the return valve since I had a new one ready to go. I still am getting dark grey smoke. I disconnected the charge pipe at the turbo and found wet oil in the pipe, but no oil in the pipe going to the manifold. After disconnecting the manifold pipe I started up the truck and the smoke got more dark with a distinct diesel smell to it.

Does anyone have any ideas as to what could be going on ? I want to bring the truck to the local detroit diesel mechanic shop but there booked for the next 2 weeks. Im getting cylinder cut out and injector response reading, could a ECU cause this ?

 

The turbo is in rough shape, I found the wastegate is seized. for the price of replacing it Im just going to get a BW S400 for it. But when the turbo pipe from the intercooler to manifold was disconnected smoke at idle got worse. So I guess I can be injectors. Im going to have a different shop take a look at it.

I just couldnt accept the previous mechanics advice that the ecu or return valve went bad.

And the turbo looks like its been leaking for a while, not a new leak so I dont think that engine oil is being burned.


ohhh sorry and I other major point. When I go to shut the engine off, the motor will diesel on me. It will actually keep running abit. It did that to me my first start up at the mechanics, when I went to shut the truck off and the motor kept spinning, run away popped into my head in a split second.

 

THIS, I know with smaller motors you can cover the turbo but there no time for that with a rig. Thanks for mentioning that, I will take a look for that.

 

I will take it in and let you guys know. Whats a good source for rebuilds ? I heard factory rebuilt ones from detroit diesel arnt that good.