Lean bank 1 2 issue fix

[jdan]

97 Expedition 5.4L
Codes PO171 and PO174 common fix.
On the back of the intake there is a pcv hose that runs from there to the passenger side valve cover Ford part # F75Z-6C324JA
It usually go's bad at the elbow.
Just thought I'd throw this up for the search function.

Pics of old to new. And rough location. Sorry it's tight back there.

 

[jdan]

Just got 2nd one in today for the driver side. This hose go's from valve cover to intake tube. Very easy to install.
Part # 2L1Z-6758-GA from Ford.

 

[expydaddy]

You Da-Man jdan! After many searches on the pcv elbows I've only read about the common crack in the back of the intake manifold. After reading your post I checked the easy one on the drivers side. It was not connected at the end of the bend! DOH! Put it back in for now. Gonna change it later. Huge difference in smoothness.


That was a great diy with pics and part numbers!!!

This should be stickied

Is there a difference in the heated/non heated lines?

Thanks jdan! U Da MAN!

 

[jdan]

Thank you Sir.
The leak causes a misreading with the mass air flow. Thus resulting rough idle and codes.
I've noticed it's runs much smoother and actually gained better mpg.
I did not take numbers on the gain but I've noticed it's using less with my routine driving.

 

[01exp4x4]

It may not be clear to understand.
But 2001 is the same part number as for the 1997 in this posting.


Whats confusing is the earlier model has an aluminum intake and the 2001 has a plastic intake manifold...


Just an FYI:


You can find any part at fords website by entering your VIN.
You will get detailed images and part numbers:
Official Ford Parts Site | Buy Motorcraft & OEM Ford Parts Online | FordParts.com


Good luck!