Where did you put the smoke in at?What kind of smoke machine set up did you use?It wasnt a Halloween fogger was it?Sounds like a vacuum leak somewhere to me did you check fuel pressure yet?
January, 18, 2014 AT 9:54 AM
Saturntech9 is correct here. I see these codes on Fords quite often and it's nearly always a bad vacuum leak, usually the PCV hose or large connector at the manifold.
January, 18, 2014 AT 11:06 AM
Also the pcv grommets get worn and the pcv no longer stays in the valve cover.
January, 18, 2014 AT 11:32 AM
They're biggest problem is the rubber deteriorates from the oil fumes and the vacuum will suck a hole right through the hose that may not be visible with the engine off. Listening is the best way to find it.
January, 18, 2014 AT 12:14 PM
I like my homemade smoke machine I made with a old paint sprayer and glow plug.
January, 19, 2014 AT 1:32 AM
Mi checked fuel pressure it was almost 30 psi.
January, 19, 2014 AT 6:34 AM
There is a major problem. The spec for this engine is 379bar (55 PSI).
You can finish here Louie. I just wanted to help you with the spec.
November, 4, 2014 AT 10:39 AM
I have the same scenario! How did you solved your problem? Please let me know.
November, 4, 2014 AT 10:45 AM
I have 99 ranger 6v 3.0 flex fuel same codes p0174 and p0171. I checked my pressure and it was around 33 psi. How did you solve your problem Dodge287? Fuel pump or fuel injection damper?