Hi there! My name is Jimmy and this is my first post. I usually can find the answers to my questions by just using the search function but I could not on this one. I have a 2001 E-450 V10 RV that is throwing codes P0174 and P0171 per AutoZone. These pictures are not of my exact engine and two that I located during my search. On my engine this hose is rotted out and I can pinch it with my two fingers it appears heat rotted. As soon as I touch the hose it falls apart.

Please help me ID the hose that has the red arrow pointed to it in the photo below:





Thank you for taking the time and looking at them to try and help me ID them.

Jimmy

 

P0171 and P0174 = lean bank 1 and 2.

Likely a vacuum leak somewhere between the air filter and the intake valves.

Those rotten hoses should be replaced if they are crumbling. Stupid mobile site on my phone doesn't allow me to see your pictures very well but it looked like it goes to the fuel pressure regulator.

Keep us posted.

 

Im50fast,

Thank you for the quick reply. I will be going out to the RV Storage this weekend to try and locate the vacuum leak and replace the hose. I will reply back with what I find and photos.

Thanks,
Jimmy

 

Looking now, Jimmy. They have the look of vapor canister hoses. Can you trace where they go under the van? jim

 

Jim, I won't be able to until next weekend, my RV is parked at a RV Storage Lot. So this could very well be my issue.

Thanks for the quick reply, I will get more information as soon as I can.

Jimmy

 

Check all your vacuum hoses and replace as needed, don't skimp as they are not that expensive and will save you problems later. The one that goes down by the transmission and under the van, if you can not access it all the way, splice it at a point where the hose is in good condition..

Check out his link.
http://www.obd-codes.com/p0174

It states: There could be a vacuum leak downstream of the MAF sensor.

May be as simple as replacing vacuum lines to clear your codes and running issues..

And don't let the parts store sell you some hose that they say should fit because they don't have the correct size in stock, go to a store that does have it. My area here has become a university town and most of the counter guys work part time while attending school. My van is a 1988 e150 and these kids here weren't even born when mine was built... I have found NAPA around here seems to keep older employees who have worked there for years. But even NAPA around here has cut down on inventory in order to compete with 9 other chain stores within 4 miles of me...

 

That's exactly what those are---good catch Jim! By all means replace any crumbling or deteriorated hoses regardless what or where their function. Keep in mind you'll want hose rated to handle fuel vapor.

Lean Bank 1 & Lean Bank 2 about 99% of the time tends to be the 90* elbow at the back bottom of the throttle body---looks like this: Dorman Products - Search Results There is a different number for the V8's so double check your actual part and buy accordingly.

Keep in mind those parts are sometimes covered with a thick flimsy insulation that can be pulled back to inspect them. Even if it tears or otherwise damaged its not critical it be in perfect condition.

BTW that second photo looks VERY familiar.................

Let us know what the eventual fix is---could be helpful to others down the road.

 

Haha, what's that saying, even a blind hog can root up an acorn once in awhile.
I obviously spent a LOT of time UNDER my van working on dual tanks and EVAP systems. jim

 

Thank you all for the information! I appreciate everyone's comments to help me fix this issue with my RV. I will reply with more once I get it fixed.

JWA thanks for taking that photo it helped out!!!!

Respectfully,
Jimmy