light blue smoke at idle - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 01-15-2014, 10:30 PM Thread Starter
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light blue smoke at idle

I have a 2008 6.4 Powerstroke with SCT hand held tuner, dpf delete, egr delete and intake installed. Truck has 110k miles. I just bought the truck a few weeks ago and when the previous owner removed the dpf filter he didnt leave the sensor probe connected to the dpf wire harness which caused a high idle. I just replaced the sensor so now the truck idles normally but now the truck blows light blue smoke when I come up to stop lights or put the truck in park. It smokes very little at cold start and starts smoking a lot after it warms up. The smoke builds up the longer i sit at a stop light and when i take off after sitting it throws out a big puff of light blue smoke. The smoke disapears while driving but returns every time i stop or let the engine come to idle speed. This isnt just your typical exhaust smoke hazing after installing a tuner and dpf removal this is much worse. This is my 3rd 6.4 and my other 2 did not do this. Does anyone have any ideas or have heard or had this problem before? Seems like it is maybe loading up fuel? Thanks
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post #2 of 8 Old 01-17-2014, 07:41 AM
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Any trouble codes? Running the most up to date tune?



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post #3 of 8 Old 01-18-2014, 07:10 PM Thread Starter
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There are no trouble codes and im not sure about if its up to date or not. Im not very familiar with sct tuners. I have ran spartan and H&S in the past. I have tried every tune available tjat is loaded on the tuner even the stock tune with dpf and egr turned off. Anyone have input?
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post #4 of 8 Old 01-20-2014, 08:32 AM
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Definitle sounds like injectors to me. The last time I saw that exact scenario is because the guy ran out of fuel (twice) and used starter fluid which damaged all of the injector tips. Replaced all of the injectors and it took care of the problem. Make sure the FICM is good before you start tearing stuff apart.
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post #5 of 8 Old 01-23-2014, 11:21 AM
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Check your oil level. If it's high you have a leaking injector or injector fuel line. Also pull the bottom CAC tube to look for oil pouring or dripping out.
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post #6 of 8 Old 10-23-2014, 06:45 AM
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Ok I have the same problem truck was just services before I bought it. So oil should be fine and all that. Now my truck isn't starting. The truck looked to have no issues and not have been run hard at all. I'm sitting stranded on the road right detuning hoping that will allow me to start the truck. Any help would be great this is urgent. Thanks!

2008 F-250 6.4
SCT Livewire w/ IDP and Looney Tunes, AFE Intake, Flo Pro 4 inch exhaust, Mishimoto Intercooler, CCV, Moto Metal 18's, Carli Commuter 2.0, TGC dual steering stabilizer[
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post #7 of 8 Old 10-23-2014, 07:31 AM
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Would the dpf not being tuned out with a straight pipe exhaust cause this? Apparently the custom tunes I have were just the pre loads.

2008 F-250 6.4
SCT Livewire w/ IDP and Looney Tunes, AFE Intake, Flo Pro 4 inch exhaust, Mishimoto Intercooler, CCV, Moto Metal 18's, Carli Commuter 2.0, TGC dual steering stabilizer[
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post #8 of 8 Old 10-23-2014, 08:51 AM
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I know my work service truck pours out whitish blue smokes when it's regening. Maybe it's been regening the whole time tring to clean something that's not there. How is the oil level ?

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