Puff of grey exhaust...
#1
Senior Member
Thread Starter
Puff of grey exhaust...
I just noticed a puff of grey smoke at start up this morning and quickly went away on my 5.4 06 F150. Do I need to be concerned?
#4
Senior Member
Induce some Seafoam through the brake booster and run a bottle in your tank at the next fill up.
https://www.f150forum.com/f4/2007-5-...r-hose-219499/
https://www.f150forum.com/f4/2007-5-...r-hose-219499/