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Grey smoke at idle

751 Views 2 Replies 2 Participants Last post by  East County stroker
2004 F 250 been running fine till the other day started smoking out the exhaust grey them if you stand on it goes to black . Boost is around 30psi . also smells like diesel out at the pipe .intermintent miss as well.
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You may want to check your FICM voltage. There's a few threads on here with the procedure. Could also be a fuel quality issue. Did you recently fill up your tank?
Thanks for the reply . I will check the voltage , and yes my son took it on a road trip . Would a bad logic board in the ficm cause this as well.
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