Black Smoke Power Lose

[Smoky]

Black Smoke Power Loss

My truck started blowing black smoke the other day and would barely pull itself down the road. I have no codes showing on the SGII. I did not have the SGII displaying the BST at the time but thought it may be the turbo sticking or something similar.

It happened as I was headed back to my home in Mississippi from the Smoky Mountains (HaHa). When I had driven about 50 miles and was entering onto I-75 on ramp, it started. As I started to accelerate at the intrstate lanes, it just started blowing blacksmoke and had way reduced power. I pulled to the shoulder, killed the engine then started it back up. Ran fine all the way home for 425 miles. My BST on the SGII was showing fine pressure but did drop as low as 0.4 under a deceleration at one point. I as pulling a very small trailer with my Harley on it so was only about 1100 pounds.

My SGIIis also showing that my FWT is about 190 to 198 degees F and the EOT runs about 18 - 20 degrees F above that at 70 MPH. I changed the oil cooler and EGR about 22K miles ago. There is 132K on the clock now.

Anyone got any ideas on where to look?

 

[willie "D"]

Having just cleaned and then replaced(questionable bearing) my turbo, I would start there. If it stuck and then freed itself the truck would blow black smoke due to the rich fuel mixture. Some owners splice a switch in the turbo solenoid wires to cause this.

 

[Smoky]

I've been watching my BST to see if the turbo is bottoming out. I took the turbo out last October, cleaned and polished it and lightly lubricated it. I can't remember hearing the turbo whistle up when theblack smoke appeared. t has happened three times and everytime was when I was accelerating after slowing down.

 

[willie "D"]

Mine would hang up momentarily and my Edge CTS would show the turbo underboost, Low egr system and low exhaust back pressure codes. But no check engine light. I'd clean the EGR valve again.

 

[Smoky]

i'm throwing no codes whatsoever but i will check the EGR Valve and clean if necessary.

 

[Dogman]

My 04 would do that and found it to be the computer. I had it reflashed and it fixed it for a short time then it started doing it again so I got a new computer.

 

[Smoky]

Does a dealer have to reflash it?

 

[Dogman]

No, I think powerhungry.com can do it but you need to call and ask them. They'll tune it to your needs also.