I have a ford f250 6.0 psd 05 with sct innovative street tune and 4 in tubro back added about a month ago. This morning when i took off normally from a stop sign alot of whitish gray smoke was coming from my exhaust. And continued to do that. This afternoon it still did it not not near as much and i believe a little smoke is still come out while crusing. Does anyone know what the problem could be? I just replaced new fuel filers in about 4k miles ago, Cleaned egr valve too.