Ford F-150 5.4L 3v Engine: Common Causes for Lean Codes P0171 P0174

[@FordTechMakuloco]

These are the Tools and Parts Needed for this repair: Latest Ford Mass Air Flow Sensor 2004-2014- amzn.to/2qy0K4I CRC MAF Sensor Cleaner- amzn.to/2qL1Bvq Motorcraft Electrical Connector Grease- amzn.to/2pfjVfD Air Filter Tray Seal- amzn.to/2pN4BdF

[@240dreamteam]

FordTechMakuloco do you have a diagnosed video for the early 2001 4.0 sohc Explorer for lean codes (bank 2 ) ?

[@1keykneedeep]

Every video I watch makes me more informed and a better parts replacement tech !! Great stuff always.

[@tonychavez2083]

FordTechMakuloco are there any videos on PCV lines replacement on older 2 valve 5.4 motors? I’m having a tough time with that elbow hose at the base of the rear intake manifold, it’s an expedition so the firewall makes it extremely tough to get back there and release hose clamp to pull off? Do you guys pull throttle body off to gain more access? Thanks bud.

[@jetjoey19]

What if the LTFTs dont move? They stay at 1.00 percent and STFTs are at .63 and bank 1 sensor 1 doesnt fluctuate lile bank 2 senaor 1. Its giving me a P2195 code. I "cleaned" the pcv and check engine light comes on much quicker than before

[@bensong1605]

Thank you sir, for all of the time and effort you spend making these in-depth, educational and very helpful videos. I'm not a certified mechanic but I've been working on my own/my families vehicles for years thanks to you and others who take the time to teach guys like me how to properly work on and maintain their vehicles. Many blessings to you, and thanks again.

[@ellesmerewildwood4858]

What a shame there aren't more techs around who actually know as much as you do and are willing to spend the time it takes to analyze and find the fault. Most of the time most people drive around suffering issues in their car for years because top notch techs like you are so few and far between. Good on ya mate.

[@beanboggs4190]

My 5.4 3v has had the check engine light on for a few years now.

[@mscottmiracle1396]

You led me directly to a leaky purge vacuum line between the manifold and the valve on a 2005 Triton F150. It was throwing both codes P0171 and P0174. Now it is not throwing any codes. You saved me a lot of time, thanks!

[@f_u_c_k5974]

I have a busted fuel/gas ABG line. I just wanna know how to replace it

[@freewheeler5480]

Want to say "Thank You" for all the videos you have produced! From an old guy that totally hates working on engines (but too cheap to pay ransom) my '04 5.4 3v runs a lot better because of you. And I'm not all stressed out! Your skills, knowledge, and personal demeanor are excellent. Best wishes and keep up the great work!

[@mikecont9742]

The knowledge you pass on and the step by step is absolutely invaluable. Thank you

[@PoisonShip_GEN1]

4 years later heavily needed this video. Helped get my 06 running great again

[@campclan1]

I just want to say that out of all the car repair video people on KZbin, in my opinion you are the best. Obviously you are a highly skilled professional with many years of experience. You make everything easy to understand and that makes all of us better mechanics. Thank you for all of the expert information. It is much appreciated. Keep up the good work.

[@paulanthony6763]

Dude you're a lifesaver. Loose evap hose on the rear of my engine was kicking my butt for days. Thank you so much for all your great videos. Will be donating to your channel.

[@willywonka077]

help me please how how do I get to the back my hands don't reach behind it

[@paulanthony6763]

@@willywonka077 its very difficult to get to unfortunately and it's all feel. Removing the brake booster might be your only option.

[@dennisferris4671]

Just bought an 07 Lincoln Mark LT I love this truck, but it has this nightmare 5.4 3V in it so that's how I found you! You are in that top 5 percent of all techs & mechanics I've ever worked with. I hope your a billionaire one day thank you far your time & work!

[@jorgetoloza269]

Dude let me tell u..I've learned so much from u that I can take an engine apart, thanks to u.

[@moneygrip4464]

I've been a mechanic for almost 25 years.. I wish I could have worked with you...

[@DoyleShadduck]

You mean you want him to diagnose all your jobs? 🙄

[@xcataclysmx]

@@DoyleShadduckwhen you’re passionate about a trade, a great teacher and mentor is what you should desire.

[@phelanward3415]

I got my 06 5.4 two years ago…. Thanks to this Godsent gentleman, I have been sorting myself out….Grateful for the help!

[@bigchungus-oj8zz]

Is it OK to tell you that I love you, bro? I just followed your 4 part series and you helped to add $8K to my truck's value. It's a Harley Davidson edition, sweetness now..you also helped me through these codes! That's more than my ex ever did for me...seriously, thank you from my heart and soul for equipping KZbin with your spot on videos, and from reading comments, your following will only grow. Peace out my friend.

[@willywonka077]

what was the issue

[@robertwainright1361]

I would like to thank you for your experience on working on these Fords. I had several code for Lean banks. I found out my vapor line had holes from a mouse/mice. I had remove the nest and replace the line. Since I am a truck driver, I don't use my pickup every day.

[@martinnc2003]

You couldn't have posted this video at a better time! My 04 f150 is throwing P0171 and P0174 codes. I'm digging into it tomorrow to see what's going on. This video has probably cut my troubleshooting time in half. Thanks for always posting great videos!

[@TurmiteRS]

What're you find?

[@paulsosa1872]

What was the issue I'm having same codes but no symptoms of vaccum leak everything reads good I'm stumped🤔

[@KollynJ]

What did you find? Same codes can’t find leak. Timing chain?

[@robertlewis4342]

Thank You - dirty Mass Flow Sensor and cracked vacuum hose on my 2005. All good now.

[@damian9157]

You South Main auto Codys diagnostics and Pine Hollow diagnostics are the reason I am definitely a better Technician. You’re definitely a master in your trade. Thank you for sharing the knowledge.

[@williamabaker12]

Definitely check the foam on the air filter box. I have a 2005 expedition 5.4 that wasn't pulling any codes (at least not to the point of tripping the check engine light), but I was getting atrocious gas mileage, as well as a drastic issue with power at times. When I would floor it, I would get almost bursts of power between bogged down acceleration. I also had the obnoxious diesel sound once warm at idle. I found that issue, cleaned off all old foam, and replaced with new padding. It solved all my issues, including (somehow) quieting down the engine.

[@lookingupwards8652]

Thanks Brian, I have a 2004 f150 5.4L and I used to work for Ford for 9 years anyways I have been chasing two codes P0171 & P0174. I have checked everything and can’t find it a leak yet when cold on medium to full throttle acceleration, it does backfire so I know there is an issue. The only thing that hasn’t been replaced on this truck is the ECM.

[@joemikos900]

Excellent video on all levels, knowledge, teaching skills, editing etc. TYVM for taking the time to make these videos. You are helping a lot if people both in and out of the field.

[@nekiolane3824]

We do not deserve this guy! Thanks for the 4th time!

[@bensong1605]

53 thumbs down? I swear I'll never understand how people who clearly need the tips/tricks/education on this subject, take the time to watch your extremely helpful videos just to give them a thumbs down. Smh. My only conclusion is that these are either low budget mechanics that are mad about you educating their would-be customers or simply just lost trolls. Take your pick. Subbed 4 life!!!

[@hondacr1011]

Or fat fingers

[@kristyhwa]

You are the most helpful i have found yet on these pain in the butt 5.4 man thanks for the help

[@trueunknown7162]

They are work horses but Good grief they are a pain!!!

[@SolivagantJourney]

Thank you for this video! Was starting to scratch my head on a bank 1 sensor 2 code. Wound up just having to clean up the MAF sensor, read KOEO voltage and it was .03, cleaned it reset and and it's been good since!

[@IsanaDasAnanda]

Of all the youtube mechanics, you are the best!

[@1keykneedeep]

You should call your channel the Ford 3valve repair network.

[@FordTechMakuloco]

I know right.

[@clydehanamaikai1394]

Had the same issue w/ my 95 ford windstar. Running lean & it was because of a dirty MAF sensor. Thank you for sharing & great video. Informative.

[@christopherrichards1025]

I went through H*LL trying to fix my lean codes on my 2005 3V 5.4L F-150...Isolated every vacuum line, pulled the manifold to check for cracks, replaced MAF, replaced fuel pump and then Fuel Pressure Sensor. Went to 2 Ford dealerships and a diagnostic shop. Last shop says everything checks out and I had to think outside the box. They even replaced the computer at no charge when it didn't fix the problem.. I had a scanner that showed the fuel trims and knew they were off. Also took into account the problems with the 05 injectors. I went one size up and replaced ALL the injectors. That solved the problem. Trims went to the Rich side but within spec. Hope I'm not just masking a problem. Been 2 years, no problem

[@christopherrichards1025]

3 years now, no problems. Had 1 coil fail, otherwise truck runs good

[@Coltography]

@@christopherrichards1025 thanks for that update!

[@johnsonbobo2376]

replace imrc valve

[@NKmechanicsLLC]

I hope you keep making videos as you have been a great help to further my diagnostic skills. I'm going on 3 years running my own repair garage near Milwaukee WI. Good man 👍

[@brushymountainbushcraft1031]

I appreciate it brother!! Mine was reading P2195 and P2197 Lean. With a little starting fluid and not saying that was wise we found our rough idle spraying that vacuum in the rear of the engine you pointed out. we will look at the other to make sure. Man, thanks a ton! Keep on keeping on! We are broke out here! This helps us so much! Thanks again

[@ethanmaiden]

And with the high inflation right now we are even more broke

[@robson5017]

Your knowledge is AMAZING Brian!

[@monroepede1]

Been driving around with engine light on because mechanic said it was o2 sensor or cat converter. I had at cat changed that looked burned up and didn't fix it. After watching this video I started tracing vac hoses and found one collapsed and dry rotten. Seems to have fixed the issue so far.

[@timothyfields751]

Thank you so much. I had a hard break pedal and rough idle after changing my f150 vct solenoid. Was at a lose until I came across this video.

[@Notorious_AR]

I have an F150 its a 2006 5.4 3v. We just had the heads redone, all new timing including phasers. Timing set the way its supposed to be. Runs fine to our knowledge until it gets to operating temps. Then it does the rough idle dies when moving slowly etc. brand new vct’s and all that as well.

[@hawaiianf1504]

Perfect Video and Perfect Timing! Bruddah as always - You and Your Videos Rock !! Got a couple important questions for you. 1. How reliable are the "Re-man'd sensors"? And... 2. What companies would you recommend if we can't buy from OEM? 3. Which companies have you steered away from? I have yet to hear any good things about Dorman electronics and of course their "exact fit parts" are already #1 on the Top 10 Don't Buy charts - unless you really, really have too. Even then -- "Buyer Beware". The wife's 2007 toyota Camry has been giving us issues lately. Her XLT Camry was bought new in summer of 2007 and has been a trouble free car from day one. Now at over 100,000 miles it's asking for some normal and expected detailed, in-depth and attentive TLC. And she'll get it. Great Car. Last week I was getting the same codes you spoke of in the video wrt the fuel trims and DTC's. Wife came home from work saying the "Check Engine is On". Using your past videos as a guide and my scan tool combined with my very limited skill sets - I was able to fix all of the issues by simply cleaning the MAF, the throttle plate and the K&N flat air filter. Bruddah - I can say this - All is well in the islands. Happy Wife - Happy life and it's real time proof to the wife that (pounding my chest like Hercules) "Man needs to buy more tools!!" -- "Honey, buying that $400 scan tool just saved us a lot of money" and "this tool just paid for itself!" (cough - cough - ah - emm, honest it does ;)) Once Again Your Videos let me fix it right and saved us a boatload of money by not having to spend on things I didn't need to buy. Not to mention that I am able to better Interpret, Understand, and Utilize my scan tool. I was really worried that I'd have to buy a new MAF and/or TBS. That would of easily cost me over $500. Toyota over here wants $198 for the MAF and a new Throttle Body (sensor included) is over $300. The TPS sensor isn't sold separately over here. I went to a friend who works at a Toyota dealership in the parts department and said the same thing "sorry bruddah - You have to buy the whole Throttle Body assembly". They said it's because of the TPS and Body design. I Say - I smell a wolf in the hen house as I cough "Rip Off" out loud. Any Howz -- Thanks Again Bruddah!!

[@puppypower5187]

Thank you so very much for all the useful i information. I even learned how to fix my gas dryer, from watching your videos.

[@dubehigh]

Wish we had a guy like you here in Minnesota

[@ArthurFleck-tx9di]

I got a million dollars! You can't fix mine! I think your by far the best Ford tech, but I have one that just can not be done.

[@xcataclysmx]

your timing is probably off and need new timing components and phasers

[@ArthurFleck-tx9di]

@xcataclysmx I don't know if the man here himself knows or has ran into this... After days and days There is a very big difference in those spark plug numbers. I will say I discovered and I will also say that in the back of the intake where it meets the heads. We're leaking ever, so slightly. You could not notice a misfire, didn't really have any symptoms that you would think? Nothing like the brake cleaner trick. Nothing like that would work. Nothing made sense. Put a smoke machine on it. Nothing and then I got the idea well. Let's pressurize the smoke a little bit and then the smoke started rolling out of the back of the intake gaskets on both sides. It was slightly leaking and that was causing so many problems

[@josephphilpott2663]

Replaced mass air flow sensor. Checked all hoses. Checked all vacuum hoses. Still running lean. 2006 F150 5.4 3v. 272,700 miles. Clueless

[@adrftgvvbh]

Did you figure out?

[@snowrider5150]

You rock man. Most informative video series ive ever watched on the tube

[@Tirechange]

Thanks for the video. Perfect info as with all your videos. Ford dealer has no info on the upgraded vacuum elbow. Ordered the whole line $160. Hopefully the new one comes with a better elbow.

[@atomicdmt8763]

vacuum leaks: perhaps also a loose/leaking OIL FILLER CAP? and/or oil filler tube: sealing grommet. I just realized my tube was not firmly secure and the grommet was torn... and the cap was quite worn/loose. New cap is firm.

[@phillipatkinson3973]

Thank u so much man I've learned a lot on these 5.4 3v motors thanks to u

[@kevintucker3354]

The 2V engines also tend to show bank 2 lean first. I’m thinking it’s the intake manifold runner design. The way the air moves through the manifold.

[@mikelouchheim927]

Have p0021 p0022 p0171 p0174 currently and just had the timing done, phasers, solenoids, and a 340hv put in..

[@Tweeder0055]

Did you find out what the issue is?

[@Hollywood4Fun]

I have the same year truck with the same motor. Today when leaving the hardware store it started making a strange intermittent clunking noise coming from either the engine or the front wheel area. I thought for sure it was something serious with the engine. The check engine light came on and code 174 and 171 were discovered later. I decided to try to drive it home 6 miles on the highway. Once I got up past 25 miles an hour there was no more clunking and the engine seemed to run fine. As soon as I got near my house and reduced speed to around 20 miles an hour the clunking resumed. It almost sounded like the four-wheel drive was attempting to engage. I got it to the garage and clean the mass air flow sensor and took it for a test drive. The clunking remained present at low speeds. When I purchased the truck which has 220,000 miles on it there was a check engine light on but after changing the oil and adding some Lucas it went away. The previous owner thought the vehicle jumped time but it ran fine for me although the codes at the time did seem to indicate an issue with the cam phasers or the timing chain. I'm wondering if the timing chain or the slack adjusters have finally worn too far? Oddly however at highway speeds it ran fine. It wasn't just a rough idle at lower speeds it was definitely clunking intermittently. I'm going to further check the vacuum lines but it sounds mechanical. Any advice?

[@Justin67j]

Okay so I was replacing driver side valve cover on a 2010 f150 5.4 had a bad pcv valve at least I think ..booster line in way of valve cover coming out, pulled it away heard a quick vacuum noise lasted about a few seconds .. when I was done completing the valve cover install fired up the truck and got a red brake check light.. felt pedal engaging brakes as I reversed put it in Park it stumbled and died ..it threw a check engine light that was for p2195 only ..reached my hand around back side of intake just like you said it had popped off when I was moving it out the way ..pushed back on problem solved thanks ford tech save my ass again..

[@p.stauffer5191]

My '02 F150 4.6 was throwing misfire + lean and rich codes. Replaced dozens of parts from exhaust to intake, manifold gasket, smog parts, etc. A Ford specialist diagnosed timing due to bad guides. $1,500 and finally no codes!

[@calikingz9924]

Thank you it seems like this ford's have the same issues but somewhat easy fix after watching your videos but they give me a big headache

[@bobjohnson8206]

Your videos are really outstanding. i never paid any attention to the bottom of the air filter as you described in your video so I inspected mine. Guess what mine was all falling apart as you have shown in the video so I order the tray seal. Upon receiving the seal the exact measurement of the seal width is 1 1/4 inches and the old foam was 1 inch so it had to be trimmed off to the exact width as needed. However the seal really sticks onto the housing just wanted to give a heads up so others will know what to expect. Although I don't have any error codes yet just trying to eliminate them before they occur. I am a firm believer of preventive maintenance. Can you tell us what the part numbers for the two hoses you described in your video in reference to the vapor feed hose and the brake booster hose to the bottom of the intake. I would like to replace both of them now before I have a problem. Many thanks, IMHO your the best videos out there.

[@paulfiebke3909]

Thanks for this vido, keep up the good work and happy Thanksgiving

[@heinzkopp8639]

Thanks for another awesome video. My P0171 and P0174 only appears immediately, when i stop the engine and restart it a few minutes later. I don‘t know what to do.

[@theashrook6129]

I was driving home from work today. Engine light came on, Autozone diagnosed and came up with P0174 on a 06’ f150 FX4 5.4. I just did an oil change and replaced the air filter about a week and a half ago. I wonder if it’s my MAF instead of the PCV. Need to inspect

[@rndemetro]

The Ashrook Same here but an ‘05 5.4. Any luck on cleaning that MAF sensor? Do you have a cold air intake on? If you do, get it custom tuned.

[@papakronic5354]

Is there a part # number for the vacuum break booster connection part showed at 3:11 in vid

[@jayzap6207]

Did you ever find the number out and do you know the location of what it’s supposed to be plugged into ? I can feel mine loose but don’t know what to plug it back into

[@futuresolar7074]

What scanner tool do you use to diagnose this vehicle?

[@joebono13]

You are a Ford god my brother..!

[@sbattleships2882]

Is he saying pcf? For the the fresh air inlit near the beginning of video? I am completely missing that tube... anyway to replace this? 0:58

[@williammason7092]

As always I learn a lot from you and Eric o

[@marwintekarli5597]

I have a 2009 F-150 STX with a long crank before start. It didn’t use to do that and it started doing it last year. Mass flow sensor and throttle body cleaned. Intake filter replaced Checked fuse 27 good Fuel pump module good Spark plugs and coils replaced Fuel purge valve replaced No cracks in the air intake duct It always starts but it cranks for two extra seconds. I can hear the fuel pump prims and it still long cranks before start Sometimes it starts right away but most of the time it long cranks before start. Any help is greatly appreciated Thanks

[@Sheeeeeeeeeeeeiiitt]

I’m dealing with similar issue on my 09. No codes of course but it’s def noticeable. Gonna start at the basics this video suggested again.

[@nickc7494]

Excellent content

[@DaddyCrane]

The Canister Purge Valve In This Truck Is The One On My 06' Ford F150.

[@Kyle-wo4vd]

Thank you for your awesome videos on this engine. Can you please speak to P0175? My truck had that one in addition to the P0174 and P2197. You nailed those perfectly -Bad vapor hose and dirty MFS. What else should I be looking for?

[@leonardmadera1010]

Not sure if you could figure my 2005 5.4l 3V issue. I keep getting a IMRC P2006 DTC and P0022 code VCT. So I went a head and replaced the VCT with your recommendation of OEM from ford for both items. Still same codes. Should I have reset my PCM to relearn my new parts?

[@rndemetro]

Run a can of Seafoam through your brake booster line. I had same trouble after replacing my intake manifold. It disappeared after first bottle of trying!

[@kenlemmond673]

Here is one more oddity to add to the diagnosis. After spending hours checking for vacuum leaks including smoke testing the entire system my mechanic could not find a leak. So he decided to check the fuel pressure and discovered it was barely in the acceptable range. This is on a 2002 F150 Harley Davidson Edition with 98K miles. So, the codes were being dropped for a low fuel condition that would look just like too much air to the computer. Weird right? He said he had only seen this two other times. Once on his F150 Lightning and once on another standard F150 with 5.4L. Solution was to replace the in-tank dual fuel pumps and all the accessories. Way to go Jason!

[@rexluongo6470]

Would have been cool to see the test drive with the new MAF sensor. That way we could see the fuel trims at higher RPM's. Great video regardless. Very informative and helpful. Checked my filter door seal and it was completely gone. Giant gap for air to enter housing. Seams like the filter seal would stop that from vortexing the MAF sensor area, but I trust your expertise over mine. I think I will try duck tape first, if that works I'll be looking for that air filter door seal. If you know where to get one, let me know. The vortex in the air filter housing was good info. Are there other seals on that housing I should check? Can't tell unless I take it all apart. Didn't want to fix what isn't broken, even though I do that sometimes anyways. Great info, thanks for the tip lesson.

[@lindyrisner2934]

i WATCHED YOUR FOUR PART SERIES ON HOW TO REPLACE THE PHASERS AND TIMING CHAINS. I HAVE A 2006 F150 5.4 TRITON. ONE OF THE TIMING CHAIN GUIDES BROKE AND CAME OUT THRU THE DRIVERS SIDE VALVE COVER. I MANAGED TO CHANGE THE OIL PUMP PHASERS AND EVERYTHING THAT YOU RECOMMENDED IN YOUR VIDEO SERIES. I HAD TO PURCHASE A NEW VALVE COVER. THE VALVE COVER I BELIEVE IS FROM A DIFFERENT YEAR. THE VALVE COVER HAD LESS BOLTS TO HOLD IT ON BUT I INSTALLED IT ANYWAY. THERE IS NO OIL LEAK, BUT WHEN I START MY TRUCK THERE IS A CLOUD OF BLUE SMOKE ONLY AT START UP. THE TRUCK RUNS GREAT. IT ONLY BLOWS SMOKE WHEN I START IT UP AFTER IT SITS OVERNIGHT. MY QUESTION IS, COULD IT BE THE VALVE COVER THATS CAUSING THE SMOKE AT STARTUP?

[@genesis204]

I’m so tired of this truck.

[@spudthegreaterusa8386]

I have a 2006 f250 with its 3rd 3valve engine in it. This thing is a plague of engine codes and crap sensor issues all the time. It never ever ends.

[@LeftyLeft69]

It’s a hassle, but my father has one with 350k+ miles on it and I have one with 205k+. Both still running strong and they’re both daily drivers.

[@jaybo516]

Amen Luke !!!

[@greggallen6283]

Thank you for making these helpful videos and sharing your knowledge.

[@kevinthomas895]

Have you ever covered oil dipstick tube replacement on a 5.4 in a Superduty? Mine has broken off at the pan.

[@AKJeeper]

I just did one on a 2003 F150 5.4. Was not a fun job. I had to unbolt the exhaust manifold from the block to get enough clearance to snake the new one in.

[@jchapman8248]

My mom's 1997 Fore Crown Vic showed lean codes P0171 and P0174. I cleaned the mass airflow sensor and the air intake but still got the codes. The problem was that the hose connecting to the PVC valve was loose. I tightened the connection and the codes went away.

[@MrRed718]

Hey man, your videos are awesome. I have those two same codes on my 2001 E150 4.2 V6 engine. Any ideas what it could be or would it be the same as this? Thank you so much.

[@christopherkennedy4564]

Thank you so much for your video. My 04 expedition has these codes, and now I know what to look for. You have saved me thousands of dollars. Keep up the good work.

[@jonrandall5490]

SUPERB !! I enjoyed this video, even tho some of this is over my head ( reading live data, etc... ). I have heard that the difficult rear booster line firewall / bottom of the intake manifold leak can be accessed via taking the drivers side wheel off and reaching in thru that way? Do you know anything about this, Dr. Ford Guru ? Mine is a 2005 F-150 with 5.4L 2wd. Thanks. Excellent video by someone who knows what he is doing !!

[@user-oq4xl9lr3b]

Brian is it true that that when I check my long term fuel trim I should use non alcohol gas, will E85 cause my trim levels to be high(lean)? Also, on a flex fuel 5.4 3v should i use non alcohol fuel when I preform the throttle body relearn procedure?

[@earldesign991]

Nice video. Thanks. I have a 05 f150 stx that is throwing a too lean bank 2 code. I have done a smoke pressure test. No visible leaks. Any idea what it may be? all Hoses seem to be in good shape.

[@mmnaz1]

Earl Did ever figure out your problem? I have the exact problem with mine now. I have done the smoke test and no leaks.

[@tttarms1970]

@@mmnaz1 did you ever find your problem

[@woog74]

I notice in the freeze frame data, the RPM was at about 1260 (ish) but MPH was 0, engine temp was 194F. I notice the truck did not have a high idle concern, and the RPMs were not high when doing the initial scan. My first thought was that the lean code was set after a harsh stop...only that is when an engine would be rich. I'm just curious, am I missing something here?

[@anthonymunoz489]

Hey boss my 08 expedition is straight piped and rear o2 sensors are not working...scanners only pulling up those sensors...when I'm doing 35 45 let off pedal and give it gas it jerks or misfires any clue?

[@rexluongo6470]

I also have the 5.4L 3v and I checked my seal on my air filter door, after watching this video, and my seal is completely gone. What do you recommend to fix the door seal? I imagine they don't sell that seal at the auto parts store. Do we make one? If so, what material is best to use for the new seal? What thickness? Do you think this vortex could cause severe lean condition and rough idle and driveability issues?

[@hawaiianf1504]

When you say disconnect the battery do you actually mean to disconnect both positive and negative cables for ten minutes or so? Or if we don't have a scan tool that can reset KAM, is doing a KAM reset using your KAM reset procedure enough?

[@FordTechMakuloco]

Just pulling the negative is good enough. Much easier for me to do a KAM reset with the scan tool but both accomplish the same task.

[@thisisthefirstimeieverchan3607]

damn i wish a comuter to read everything like that i have 0 codes but i know for a fact not everything is up to par like the fuel pump and injectors im sure are dirty they are completely stock

[@GIGABACHI]

Awesome job. Keep doing it. (Thumbs Up).

[@alrui]

Hi Brian, you mention fuel quality. Any thought on why I'd start getting P174's shortly after a fill up? Coincidence?

[@chriskibbe2901]

Can’t believe I’m asking this……where/how do you find replace vacuum lines/tubes for 5.4L 3v? Would think it would be easy to find kit(s), but unless you do this by simply buying off the shelf emission hose at any parts store, I can’t find what should be any easy find. Pardon my being so brain dead, but much appreciated if any help…..

[@thomashurley1163]

Any chance you could provide a link to where I can buy the vacuum hose elbow with the clamps that you showed in this video? And thank you so much for your videos. Just finished the timing job and oil pump replacement and I could not have done it without your excellent 4-part series. I’ve been watching so many of your videos lately that my wife is starting to get jealous...

[@danielhucklebridge5006]

Brian, did you ever see smoke, during a smoke test, on an older 5.4 come out of the dime-sized metal cap on top of the I.A.C. ? I did, on my 98 F150. killer part was,,it was a new, after-market I. A. C. pays to go Motorcraft.

[@FordTechMakuloco]

Yes this is normal along with the eve valves and IMRC shaft seals.

[@asphaltwarrior1]

P2197 on a 2010 F250 Super Duty 5.4L should I just change the O2 sensors ? I've got a P0161 and a P0152 also , so three codes all on Bank 2.

[@jonanton2377]

Great video, great info and very well done. Thanks

[@funkykoldmodena]

I keep getting lean codes on my 2006 F150 5.4L on mainly bank 1 but sometimes on bank 2. I have smoke tested Vacuum system and no leaks found. LTFT bank 1 idling is around 15% . exhaust smells rich to me also received O2s11 code once but hasn't came back. truck will intermittently mis and loose power on highway. Just not sure if I should replace 02 sensors again as I changed them all about 15k miles ago.

[@jonathanandrews1407]

Do you have a video on rich codes on both banks?? 07 navigator L is throwing a 1719 and stayin in first gear at times when cel is on, goes away after being cleared. changed the fuel pump, injectors, maf sensor, 02 sensors, coils, evap canister, ecu update, and cam position sensor (code came up once), no fuel pressure regulator on rail to change, starting to think its the throttle body?...truck is driving me loco... p.s - when the truck has cleared codes its runs and drives flawlessly...big fan of your videos, any help would be great!

[@gregsidel3557]

Thank you very much, I thank you for explaining everything The way You do

[@alhoodhoud6909]

Thanks brother. You are smart school. I would say that we love you brother here in Iraq 🇮🇶. You’re awesome 👏. Quick question please, my 2004 F150 5.4 the RPM is up and down up and down it’s not solid. What do you think makes this issue? Thanks brother

[@scratchdust8116]

Hey love your content. Please keep up on the content. Also do you have a part number for the brake booster updated hose?? Need that part for sure. Thank you.

[@keithstory7650]

I'm having the same issue 05 f150 5.4 Triton 3 valve I rebuilt the motor has 200 miles on it compression is 150 sounds great po175 rough idle changed everything catalytic converters you name it good fuel pressure no vacuum leaks any suggestions new plugs new coils 40 PSI fuel pressure new mass airflow sensor check the air filter box new air filter nobody can figure it out

[@MrJuiceyjuice9]

Any thing different for the two valve ? I have a 2001 and have had trouble with both lean bank codes and recently experienced a rough idol and rpms bouncing and occasionally wants to die at a stop

[@crystaldubois5265]

Thanks for this video. The Vapor line at minute 2:00 on my 05 Navigator is really brittle, and flattens ( collapses) when the engine is started. I'm having a hard time finding a replacement that looks the same. Is this just a run of the mill vacuum hose, or is it a specific part. If it just regular hose, any idea what size it is? 3/8th inch? Thanks for your videos!

[@traviskeffer9922]

I had the same issue and asked myself the same question because the line is different. But I used regular hose. Because I couldn’t find that style hose and it fixed the issue. So regular hose is fine.

[@crystaldubois5265]

Thank you!

[@augustobalbuena4641]

Have the Same Issue P0171&P0174 in my 10 Silverado Really apréciate any Help thanks 👍

[@robertmoore1362]

Having a tough go with a 4.6l 3v lean codes the maf is clean and reads zero. Would you replace the o2 sensors and maf. Or is something else. I've replace evap hoses Just not sure what is

[@nealcoppola9963]

Do the Newer MAF update the Baro the same way the Old one's Did ? You had to operate at WOT a few times before Baro would update. If I remember Correctly PCM only Looked at Baro at Start Up and a WOT event. If no WOT-- PCM operated at Baro reading for entire time engine was running. Baro was Altitude Compension Input to PCM. Is that still True ?

[@AndrewDottavio]

Would this cause high idle when the truck is in park? My rpm’s are at 1,100 in park I would assume that is a vacuum leak

[@garypitzer8729]

Do you have A video of 4.6 two valve what are causes of lean code & vacuum leaks? I have A 06 f-150 stx 4.6