6.4 Powerstroke Rough Idle Fix! Complete How-to Instructions 

I am no mechanic and don't know much about motors but this step by step video help me out and I got the job done. Thanks so much 🙏

Great video, thank you for posting it! This helped me out tremendously.

Every single one of your videos is my exact problem, so glad i stumbled on your page, great information, very helpful! Thank you

I was always afraid to tear into the 6.4 but I had the exact same symptom and figured what the hell, awesome video. Really appreciate your time to post it and show the steps very well. Battles getting the valve cover off a bit but it idles like a champ now!

A tricky problem and you showed how to solve it,..thank you !

Just bought a 2008 450 with 100K. Love this info as i start my journey to Delete. Keep those videos coming .Thanks

This video was super easy to follow and saved me so much money! Had the same issue with my 2008 F250 and the mechanic wanted $700 to fix. I ordered the sensor online, followed this video and fixed it for under $50.

I fixed my truck because of this video. Thanks!

Thanks for this! I am having the exact same issue with my 6.4l w/EGR delete and mini max tuner. Good quality of the video and you certainly saved me from taking it to the dealer.

Awesome, I think I'm gonna have to try this! I was fear the worst when I noticed my truck doing this. This gives me hope that it's not a valvetrain issue!

Right on man thanks for the video! I don’t have any issues with my 6.4 but always like to see problems and solutions. I’m also in the same county!

I have to do this, thanks for the video. Well done.

Excellent video!! Thank you!!

Great video. Used this to complete a job this weekend. I will just add. Once you get the valve cover off, place a towel into the valve area under the injection connectors. If by chance, you drop anything you do not want it to go into the heads and block. That becomes very expensive.

Thanks for the video Taylor! I have been having the same problem with my 6.4 hopfully this helps

Excellent job....

Great video that was very helpful with procedure that enabled me to change sensor. Unfortunately, started truck and the symptom still existed.....Turns out the cause was the accelerator pedal!

Thanks for the info. Really appreciate it.

Love you and you have great videos

Great video!!!

Thank you. Liked and subscribed

Cross fingers... I’m about to do the same fuel rail replacement as you. Same exact symptoms lol. Thank you Taylor !

Thank you

This video needs more likes! Great quality, you used all the proper terms and it fixes the problem addressed! My 6.4 has 337,000 miles on the original engine and I’m too lazy to change out the FRP sensor, so I’m waiting for my injectors to start missing😆

Thank you.

Great info thanks

I am a diesel mechanic at a well known shop in FL… dude you actually just saved my ass on my own 6.4. I swore to god it wasnt idling right but i never could prove something was actually wrong. I actually had gone to a point to where I thought I was just having an OCD problem. Now I know I’m not fucking crazy and that my idle actually is fluctuating. I tried finding information identifix… I tried talking to other diesel techs… I started scoping out sensors and stuff… nothing I’ll admit the fuel pressure sensor seem to have slightly off readings but nothing enough to cause me to wanna replace it. Hmmm i feel like a real jackass now. Something is so stupid as a sensor it’s just barely not reading right.

Good video, thank you. Hey You tube I skip every single ad, every single one , every single time.

I love my 08 Super duty F350 when that engine is running there isnt any other truck that sounds as sweet. Working on them looks more intimidating then they are. Just follow the videos and if they say take the cab off make the effort. It will save you time and frustration. If you have to hire a guy with a small crain truck or other lifting device do it. You should be able to put the cab right on top of the box with acouple of 2X10's and some blocking. If space is a problem and then deal with that leftover down pipe from your EGR delete and rerought you EBP senceors and tubing. And do whatever else you might need to do. Just put the money together and have all the parts on hand. You and your truck will only benefit from it. PS my truck has 140K miles on it and this is now the end of 2023 happy new year 🎉🎉🎉

Awesome video bro. Doing this tomorrow on my 2010. 👍👍

Must say, well done 👍🏻

Great video by the way, it's super high quality and you explain a lot in your video. I was able to complete this job because of a this video you made. This actually wasn't too bad of a job, I did it on a 2010 power stroke, that has around 260,xxx Miles on it. Thanks again for the great video, better than most diy car videos on RU-vid.

hey man thanks for all the videos.. i am about to buy A used 2008 f350 any tips on what to look at?

Did you have any codes with this issue my truck is doing the samething just no codes

Hello. Great video, i like the way and pace how you give the info. I have a 2008 F250 6.4L 4x4 that has the monkey drums sound coming at the air filter box with P0284 Cyl 8 fuel contribution code, P0281 Cyl 7 contribution code P0269 cyl 3 contribution code, P0308 misfire Cyl8. I did the Buzz test with scantool, power balance test that was showing faulty Cyl 7 and low cyl 8 and 3, all other cylinders were good, i did relative compresion test that show the faulty cyl 7 and 8. I have good resistance test for all injectors, 3 psi at fuel test port at fuel cooler, new fuel filters the 10 microns and 4 microns. Because the sound is so loud at air box filter, do you think that i have a bad or mor exhaust valve (s)that is not moving and returning the backpressure to the intake valve? Do you think that the rocker arm tip is broken/bent that is not moving/making contact? Or Do you think that i have the notorious pushrod stuck? I do not think that the piston is not perforated because the sound is only at idle, after 2000 rpms the sound dissapear. I do not have open-stuck injector because i remove all the oil from the engine and put the KOEO to run the test and no leaks. The FRP sensor was giving good healty pressure for the 2 banks, so no stiction. Can you give some idea or analisys of what can be wrong?

i’m having the same problem and occasionally getting a check engine light for low rail pressure. the fluctuation just started in past couple weeks and is the same as you described. could the sensor also cause a check engine light?

My 2008 f550 6.4 idles like this also but will hesitate as i gas it for power also has thrown p0087 it did this 3 months ago so i replaced filters. Filters were very dirty and full of mud looking particles inside. So i will be dropping tank and cleaning it up but still dont think it will solve the idling and code issue. Already replaced low pressure pump twice! Today i replaced it bcuz it it was under warranty from last time which it did fix for 3 months! Did not have idling issue the first time. Could i have a fuel pressure sensor issue?

You mentioned a rough idle and white smoke bellowing, can you elaborate on what direction for these symptoms? My truck has a light rough idle once you begin driving it seems to disappear; however, my wife said she noticed gray smoke coming out of the exhaust and if making significant acceleration it puts out black smoke which is typical for diesel's without the DPF.

Post some 6.4 videos hoss love the content

All that work for a damn sensor. I'm picking up an f450 this weekend but luckily the 6.4 is already blown so I can start the Cummins swap. Not going down the Powerstroke headache route.

Could you tell me more about that rough idle with white smoke issue that you mentioned at the end? I've got that in my 2008 6.4. I was told theres a misfire. What do I need for a part? Could you tell me briefly what I need to do?

My 08 is doing the exact same thing. Never any abnormal smoke from the exhaust, but does occasionally go into limp mode. Shut it off & restart and everything goes back to normal except for the occasional idle fluctuation. So soon I'll get to this fix. Won't be as easy for me due to neck and shoulder issues, but I can take as long a needed being I'm retired now and don't need my truck as a daily driver.

Hey Taylor, nice video, super helpful. Quick question, did your boost go up while the issue was happening? And did you feel the truck shake a bit when it did it?

This is a great tutorial and a huge help when I did mine this weekend. My next 2 repairs are the fan clutch and water pump. My question is after I primed the fuel system and started it up the check engine light is still on and the power feels as though it is still in a "limp mode". (My truck is entirely deleted.) I noticed at 40mph I wasn't getting much if any boost. Maybe to the first line. My question is do I have to clear the codes on my programmer before I drive it? And by clearing the codes will I get that power back?

Trucks doing same thing but no codes. Was your truck throwing codes?

So what would the problem be if it's having the same problem but with subtle white smoke coming from the exhaust?

Did you have improved throttle response?

got a quick question do I have to undo those studed bolts or no ?

do you still have the truck? would be great ot get an update on your mileage and any other issues you've encountered. TIA.

Why do I have to remove 10 things to work on 1 thing every time? 🤦‍♂️

Btw ,, in my truck when i did tne same thing youre doing, i noticed that the whole area there was kind of oily black , any thoughts? Why

I have the same issue with my 2008 F350 6.4L. Idles rough, but as soon as I start driving it, it runs normal. I took it to a couple different shops, they diagnosed piston #7 running 10% low and told me a need a new motor. The other shop replaced my rail injector at that same piston, but the problem still persists. I am about to bite the bullet and get a rebuilt motor put in it, but before I do, I may take it to a 3rd shop for another diagnosis.

Did that to my f250 6.4 ,, and is a pain in 🫣🫣,, is there a y video o how to replace rocker arms ?

Question.. mine does it at idle and when cruising at any speed. When the pressure is measured it jumps all around. Throws code (high pressure fuel intermentent) thoughts? Sensor issue?

While driving between 1500 and 2100 rpm’s my 08 6.4 doesn’t stay steady. The it will sound like it’s cutting out. Will this fix that?

I always thought head gaskets were a cab-off job but it looks like it could be done cab-on from what I saw in this video or am I way off?

you ever dealt with the dreaded death wobble or had to change out the body mount bushings

About to try this fix on my 08 6.4. Just wondering how long that took you to complete? I would assume a half day maybe?

Hello question I'm having the same problem with the rought iddle. I'm pulling it apart tomarrow morning how lond was the prosses? Any thing I need to know any special tool needed ? Thks Steve

Did it Sputter and run rough? Like a misfire at idle? Any other symptoms to go with this?

My 6.4 miss seems more pronounced than your vid. When outside the truck you can hear it out of the exhaust sounding like a quick miss or skip every 20-30 seconds. It’s only at idle as well. I deleted dpf and cat so it’s much easier to hear. No check engine lights, it’s just been worrying me. Is this what yours was like? I guess I’ll have to start with the easy fixes and work my way up to this sensor...

Did it throw a dtc code on your tuner, i got the code p2291 injector control pressure too low.

So my truck has been running rough. I’m getting the code that my sensor is intermittent. It’s very random when it decides to run rough. How well did it work for you with the replacing of the sensor?

Ok so my 09 6.4 has been idling rough for a while but runs great when getting into the throttle. Today I stopped at a stop light and it ties. I cycle cranked it twice and it fired back up. I drove to my location and killed it. It cranked back up fine. I drove it to the gas station and got diesel. It cranked back up but seemed like it struggled. I turned out on the road and stepped on the throttle and it fell on its face and died. Now wont crank. I can hear my pump running when I turn key on. Could have the sensor gone completely out and causing my no crank issue?

Can someone please help me figure out where the fuel rail pressure sensor is on my 2014 Ford Mustang v6 3.7?

Your diagnosing it by shooting the parts cannon?

Anyone know what might be causing my 6.4 to shake when I let off the accelerator but then rides smooth once I’m back on it. Not suspension or tires they’re all brand new. I just put diesel and it started doing that 😢

Was your truck throwing a P2291 code?

Did that problem show up on scanner

Was this blowing smoke and causing a misfire in a specific cylinder?

Would it ever turn off?

Do you notice any difference on your mileage???

Mine is idling rough and also loss of power.. but mine is blowing white smoke.. please help

Taylor my 08 is doing the same thing really dramatic at idle could it be the same issue cause runs fine at speed

What is best things to look for to know this 6.4 is to far gone

You should have changed your air filter, The restriction gauge is pulled in quite a bit. It's not a 10 mill nut, it's a 4 mill. The studs and bolts don't come out if you don't force them. You wasted your time putting a Napa sensor in.

You ordered new gaskets right

Hey

Thank you