Grey smoke instead of black?? - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 10-11-2011, 06:45 PM Thread Starter Rookie
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Grey smoke instead of black??

So I was running around today and noticed that my exhaust was a grey color instead of black like usual. My 6.4 is running with an S&B intake, AFE machforce downpipe back exhaust, and an Edge race evo on the 90HP tune.
Noramlly it would be black on turbo spool up and that was all I would see for smoke. But with the grey, it is on turbo spool and if I step on it at around 70KPH it puts out some grey as well. What could cause this??
I set my chip back to 50HP to tow this weekend, could the towing have had anything to do with it?? Any help would be appreciated.
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