PCV Elbow

[AppleWood]

My truck is throwing codes for fuel-air ratio condition and research here tells me the first thing to check is vacuum leaks. (P0171 / P0174)

That's my problem - has anyone ever fished the hose from the back side of the SOHC V-6 engine intake manifold!?

I was able to pull the PCV and the two hoses (all's well there) attached but it seems all but impossible to pull the hose going down to the back side of the intake. Is there a clamp on the hose to the intake?

Any tips, secrets, workarounds would be a tremendous help...

Thanks

 

[swshawaii]

No clamps on elbow ends. 90 degree plastic tube rarely fails. Did you see this sticky?

P0171 & P0174 4.0L SOHC's Sport/Sport Trac
http://www.explorerforum.com/forums/showthread.php?t=314670

 

[AppleWood]

Yeah, I did read that post before - Thanks.

I pulled and cleaned the MAF sensor, sure didn't look bad (or that dirty). I'm at a loss here. My car runs fine, which is aggravating too? And that CEL will bug me to no end...

 

[swshawaii]

Best "How To" list on the forum for the 4.0L SOHC. GL

Lean condition procedure
http://www.explorerforum.com/forums/showthread.php?p=2364255

2000StreetRod's Helpful thread list
http://www.explorerforum.com/forums/showthread.php?t=263665

 

[AppleWood]

Well now - I've found something that definitely needs to be addressed! Pulled a very rusty plug out of #5 cylinder. Gap is at 0.100" ! Just a little worn out, eh? 143,000 on the odometer.

Why are AGSF - 22PP plugs so hard to find? What's a reasonable substitute?

 

[swshawaii]

Motorcraft SP500 FineWire Platinum is the direct OEM replacement. Ford now uses the shorter part number.

Alternate/OEM Part Numbers AGSF22FM, AGSF22FMF6, AGSF22PP
https://www.rockauto.com/catalog/moreinfo.php?pk=949946