Fix for Check Engine light codes: p0401, po171 and po174
#28
That elbow seems to be a weak point for sure, from all the posts on this thread.
That same part gave out on me a few years ago, and the CEL did, indeed, come on.
I was lucky, because when I popped the hood, I heard a distinct "hissing" and managed to trace it to the split elbow.
Rather than going to the dealer for the part, I fabricated a repair on the spot, using a copper plumbing elbow and a couple of appropriately sized sections of heater hose that slipped over the elbow, the plastic vacuum hose and the engine nozzle with a tight fit.
The repair has held up - the only shortcoming is that the heater hose softens over time, but that is probably no more or less than what the original piece undergoes, so I just replace the hoses when needed.
Seems to me the deterioration of that elbow has a lot to do with the tremendous amount of heat it's subjected to, the friction of the upper rad hose rubbing against it, and the soft rubber compound it seems to be made of.
In any event, it's a pretty simple fix for a problem that can cause so many drivability problems - glad you got it traced and fixed.
That same part gave out on me a few years ago, and the CEL did, indeed, come on.
I was lucky, because when I popped the hood, I heard a distinct "hissing" and managed to trace it to the split elbow.
Rather than going to the dealer for the part, I fabricated a repair on the spot, using a copper plumbing elbow and a couple of appropriately sized sections of heater hose that slipped over the elbow, the plastic vacuum hose and the engine nozzle with a tight fit.
The repair has held up - the only shortcoming is that the heater hose softens over time, but that is probably no more or less than what the original piece undergoes, so I just replace the hoses when needed.
Seems to me the deterioration of that elbow has a lot to do with the tremendous amount of heat it's subjected to, the friction of the upper rad hose rubbing against it, and the soft rubber compound it seems to be made of.
In any event, it's a pretty simple fix for a problem that can cause so many drivability problems - glad you got it traced and fixed.
#37
#38
i get the code for insufficient flow and sometimes excessive flow. i replaced the dpfe and egr and the codes wont go away. i put some cheap stp fuel cleaner in the tank, and the codes finally left. this was a year ago, and the codes have come back. the cleaner won't work anymore.
i checked the elbow, and it doesn't go flat, and there doesn't seem to be any visible cracks or holes. should i replace it anyway? any thoughts to what else it could be?
i checked the elbow, and it doesn't go flat, and there doesn't seem to be any visible cracks or holes. should i replace it anyway? any thoughts to what else it could be?
#39
#43
anyone know if the p/n F8UZ-6762-AA is still current for this hose? The dude at the dealer had no idea what I was talking about. Fordparts.com calls it the "elbow-crankcase vent tube" and it's 17 bucks, but I'm not sure if it's the right part. Any ideas would be great thanks.
i can't find the elbow piece, my truck has been running horrible lately, thanks 04blackedge for posting that tip about unplugging the battery then turn the headlights on. That is really cool to know.
If anyone can help me locate this little elbow thing that would be great
If anyone can help me locate this little elbow thing that would be great
#45
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#48
Just wanted to say thanks. You guys ROCK!!! I had done everything from new plugs, new EGR, new fuel filter, cleaned the MAF and replaced the Differential Pressure Sensor and it still idled rough hot and threw the codes. Went and replaced the elbow yesterday and SHAZAM!!! No more codes and it idles great. Thanks again!
#50