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  #91  
Old 03-24-2013, 09:53 AM
DannMarr DannMarr is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Quote:
Originally Posted by Jfuentes View Post
Wats up guys I own a 99' 2.5L SOHC had code p0171 and at times the p0174 as well have my Matco scanner keep checking it but have no luck getting rid of it I've done the following to it..... Both O2 sensors being a So Sohc it only has bank 1 anyway changed them my self however I replaced them with 'Denso' ones, around $50 each Motorcraft was looking at a out $120 a piece... changed my fuel filter... a couple of air vacuum hoses that looked beat up did do the Carb test with no luck though... changed my MAF sensor a couple of times already and I do recall feeling differences in between changes... have gotten PCV valved changed even the hose that comes with it... I have gotten out my EGR valve to get clean as well n still have no luck... I have replaced a gasket on my pipe right after catty it was bad an licking from there... haven had any luck yet getting rid of my CEL but have made my truck run better n increase MPG. ANY HELP WILL BE GREATLY APPRECIATED THANKS....
I had my engine smoked by my mechanic and found a leak at the EGR gasket. I added gasket sealant to the gasket. Code never came back since.
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2001 Ford Ranger with the flare sides. 4x4 with a 4.0 engine. The only thing I did so far is: F/R Brakes, rotors, drums, F/R shocks, tires, bed cap, cone filter, hanger/shackles, F/P wheel bearing, upper control arm, lower ball joint, filler neck, fuel filter and DPFE sensor, muffler, sway bar links and spark plugs!
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  #92  
Old 03-29-2013, 06:00 AM
DannMarr DannMarr is offline
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Posts: 258
Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Update; My replacement hose was collapsing and started to sweat so I decided to buy the correct part. I went to Ford to purchase the elbow. They said part # F8UZ-6762-AA is incorrect, it is not a Ranger part. If you need the elbow, it only comes together with the whole hose assembly (part #4L5Z/6758/HA) $37 at Ford or $23 at Amazon.
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File Type: jpg elbow.jpg (6.3 KB, 51 views)
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2001 Ford Ranger with the flare sides. 4x4 with a 4.0 engine. The only thing I did so far is: F/R Brakes, rotors, drums, F/R shocks, tires, bed cap, cone filter, hanger/shackles, F/P wheel bearing, upper control arm, lower ball joint, filler neck, fuel filter and DPFE sensor, muffler, sway bar links and spark plugs!

Last edited by DannMarr; 04-01-2013 at 07:33 PM.
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  #93  
Old 03-31-2013, 04:36 PM
Bleeatch Bleeatch is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

My 02 Ranger started throwing the same two codes and sure enough, there was a crack on the under side of that PCV elbow. Autozone P/N 46025 did the trick. BIG THANKS!!!
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  #94  
Old 03-31-2013, 04:45 PM
Vblueranger Vblueranger is offline
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Quote:
Originally Posted by TXCOMT View Post

It's kind of a pain to get the old one off; I had to use a knife to cut it. The new piece should be a breeze! Just put a little dishwasher soap or lithium grease on inside ends of the hose and it should slip on easily.

TXCOMT
Use a heat gun slip on your new one right away
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  #95  
Old 04-01-2013, 09:57 AM
DirtyD925 DirtyD925 is offline
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I used an angled coolant hose I got at kragen and cut it down to fit it works perfectly and only costed about $10
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  #96  
Old 05-29-2013, 09:30 AM
mindbender mindbender is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Great post. Pics helped a lot. Got the codes, checked mine, huge gash in front hose. Replacement at Ford includes hard line, front and rear elbow, but cost $27 bucks.
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  #97  
Old 07-23-2013, 03:41 PM
bodkin1 bodkin1 is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

I just did this today. Even though the elbow hadn't gone bad yet I got it out of the way so I won't have to do it in the long run... gotta replace the thermostat housing this weekend.
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File Type: jpg 100_6581.jpg (85.3 KB, 63 views)
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  #98  
Old 09-12-2013, 09:16 AM
Richey27d Richey27d is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Do you think a crack in this line can cause the transmission not to downshift from 2 to 1, causing the engine to stall while coming to a stop? Thats the problem im having now, but if i manually shift it down to 1 on the column, i dont have any problems at all?
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  #99  
Old 09-13-2013, 06:35 PM
5.9cummins 5.9cummins is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

My 2002 had this same problem. Had both codes was something I fought for about 2 months. Mine was kinda major. Like top half was ummm like missing. Lol but it caused mine to die if it sat and idled for to long
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1997 ford ranger 4cyl 5 speed 2dr 245k
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2002 ford ranger 4.0 4wd ext cab cold air flow master 40 aftermarket wheels hids 159k
1988 gmc Sierra 2wd log bed maroon 224k miles
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  #100  
Old 10-21-2013, 10:29 PM
Dozer02 Dozer02 is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Excellent write up & pics! I first experienced that problem back in 02 when my 01 had only 23,000 miles on it! Idle was high when warmed up, light was on, I was at a loss. My brother came over and we checked everything until finally he found that POS elbow! I did exactly as you did, tore that garbage elbow off and put a piece of 5/8" fuel hose in it's place, problem solved, never looked back. Now at 170,000 miles+ and that hose is still there in perfect shape doing the job that ******* O/E elbow should be doing! Here I was thinking mine was the only one!
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2001 Ranger XLT 4x4 Off Road Supercab Flareside 4.0L SOHC Deep Wedgewood Blue, fully loaded with towing package.
Added a K&N FIPK air intake, Basani Aft Cat exhaust, & a Granatelli MAF sensor.
Body add-on's include a Fedco hard Tonneau cover, Lund sun visor, Auto vent shades on all 5 windows and bug deflector on hood lip. All front lights are currently HID.
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  #101  
Old 10-27-2013, 01:14 PM
foxracer025 foxracer025 is offline
GOT 35'S???
 
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Had both lean codes, went to autozone and got a piece of PCV hose and put in place of the split elbow. Now there aren't any codes but it dies when I shift from drive to park. Any ideas?
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2001 Ford Ranger XLT, Super Cab, Flareside, 4x4, 4.0L, 4" Superlift Lift with Pro Comp MX-6 w/reservoir for the rear with Pro Comp MX-6 monotubes in the front, 3" Body Lift, 35x12.5x15 BFGoodrich Mud Terrains, flow master, 200 amp alternator with 0 gauge to the cab nom nom, K&N Intake, Tinted Windows, fog light mod, american racing seats, dynamated cab, back up camera, CB Radio w/external 15W speaker.
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  #102  
Old 11-15-2013, 03:19 PM
Echofall Echofall is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

Been dealing with both codes for a week now, and finally got some time to work it today. I was assuming it was a dirty MAF, but as I had the intake apart to clean it, I noticed dirt and oil around this area. Squeezed the elbow and as you guessed it, it has a gash in it. I'm glad I found this thread to confirm this is a common issue. Off to the parts store for fuel line!
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2003 Ranger FX4
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E3 plugs - JVC 6" touchscreen headunit - Herculined rockers - LineX bed - Bushwacker bed caps
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  #103  
Old 01-08-2014, 09:40 AM
swanjp26 swanjp26 is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

I have '97 Mazda 4.0L. Would I have this 90 PCV hose elbow in the same spot by the oil fill? My PCV valve is on the driver side rear of the engine, and the only hose seems to be a short elbow going from the plastic of the intake, to the PCV valve itself. That elbow is fine, and the PCV valve is new.
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  #104  
Old 01-21-2014, 03:48 PM
joseph.rupp joseph.rupp is offline
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Default Re: If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here!

is this a commen fix for this problem on 4.0 engines from '99 too? Those two codes are on mine and no symptoms like fuel leaks, unusual noise, rough idle, stalling or the like. Thanks

----------

Is this a common problem for the '99 engines with the same two codes as well?
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  #105  
Old 01-30-2014, 08:16 PM
pk9298 pk9298 is offline
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Yep. That's the problem!
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2001 Ford Ranger XLT 4X4
Extended Cab Stepside. Offroad package Tow Package
4.0 SOHC V6. Full synthetic. 85,000 miles
Goodyear Wrangler Authorities A/T 245/75/R16.
Deezee Bull Bar, Led Lights.
The Lone Ranger
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elbow, lean codes, o2 sensors, pcv, po171, po174

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