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Old 06-12-2012, 04:46 PM
ColoradoRanger ColoradoRanger is offline
Join Date: Jun 2012
Posts: 5
Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Thanks for great post. Drove me nuts with the flakey idle. Changed fuel & air filters, cleaned PVC, etc. Still same codes. Finally stumbled on the elbow with hole and of course was told dealer item. I wrapped some super waterproof tape around the elbow (from the local 99 cent store) and all was well on codes and idle normal again. Now I've found Forum and will be attempting to diagnose a new engine noise. By the way, buddy had a plastic water housing in the same area with a split seam and repaired it with JB Weld inside and out.
2001 Red Ranger Edge, 4 wheel drive, Automatic, 4.0 SOHC engine, King Cab, 130K miles
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