Code 170 and 174 solutions
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Code 170 and 174 solutions
I have lean code readings on my 98 E-350 super duty 275hp engine. What should I do? I know about the PVA (?) hose and the map clean or replace and places to look for vacuum leaks including the water spray to find intake manifold leaks, but I need more hints and tricks.
Fleet Owner
Joined: Aug 2010
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From: Reynoldsburg, Ohio
Typically those codes show a lean condtion, most likely the 90* fitting at the back of the throttle body leading from the PCV tubing. They tend to be covered in a thick insulation so when/if that part cracks its nearly impossible to see without digging a bit deeper.
Dorman and probably 100's of other aftermarket outfits sell that part, like this:
HTH
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