F150 5.4 triton

Asked by Apr 10, 2017 at 02:05 PM

Question type: Maintenance & Repair

I have a f150 blowing white smoke that
smells like gas. I replaced the spark plugs
and coil packs and it runs smoother now but
the smoke concerns me... Could it just b bad

3 Answers


White smoke is a sign of a bad head gaskets. Check the engine oil for coolant and the coolant for signs of engine oil. Running rich could make black smoke. A compression test is in order.


I have seen a few rigs that blew white smoke and it was gasoline, the cause was a ruptured diaphragm in the fuel pressure regulator, replaced the regulator, cleared the system of excess fuel changed the oil and filter and was good to go. It still blew white smoke for at least 5 minutes until the catalysts burned off the excess fuel and then it ran great, was not a headgasket in this case, so check the regulator before tearing it down.

1 people found this helpful.

Thank u very much! I will try the diaphragm and let you know

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