Hi guys, my 2000 sd gave me the following dtc's,
p 0171
p 0174,
system too lean bank's 1 and 2,
when I bought her 11 months ago the dreaded tb to pvc hose was cracked and my mechanic taped it so I could get it replaced since it worked fine I didn't replace it; could the hose have gotten worse?
Any ideas?, thanks.

 

Yep. Classic sign that the PCV hose is leaking are those codes. My guess is the tape is not holding up anymore.

 

the replacement hose should be really cheap..

why not just pony up and replace it !!! i mean how long did u expect a tape repair to last ???

 

When the tape repair was made I ordered a new hose and the guys never ordered it, no biggie because no money was involved, ordered replacement will have it by tuesday, thanks for the imput guys!

 

You might also want to clean the MAF while you're under the hood, just for grins

 

I have the same issue with my E- Superduty.

I have cleaned the MAF (For the 3rd time) and replaced the PCV valve and hose. Maybe a computer reset is needed so it can re-learn??

I have pulled the same codes before. Now that I have serviced those issues I have only put about 250 miles on it so I don't know if a code will toss but the pinging is still there. Grade of gas makes zero difference. I know detonation is bad and tow my Jeep on a trailer. I dont want to hurt it.

SO the Ford dealer (I paid $178 for this BTW) scanned it and checked it out and said it's normal. It never pinged like this before and I have owned it sense new. It's a Class C motorhome.

I did foul the MAF many years ago with a K&N. Removed that and cleaned the maf with rubbing alcohol and a swab. With that the pinging went away instantly and so did the K&N.

Any thoughts?

 

You have unmetered air entering the intake, meaning it's getting in there AFTER the MAF.

There's a vacuum leak somewhere. Have you double/triple checked all the hoses?

 

Yes. I even had the Dave from Blownoutsparkplug.com look everything over when he did inserts a couple of weeks ago. He said the knock sensors come loose and cause that issue but mine were tight. That's another thread I will post up to share that experience which started out a big negative and ended on a plus note.

Now I am thinking I have an intake manifold leak or maybe the gasket behind the throttle body? Hard deal to chase down.

Maybe I should just change out the Ox Sensors. Heck they are what, 11 years old.

 

Will do! did this to my PI swapped 96 Mustang GT a couple of weeks ago