Really need help finding a misfire f150 ecoboost 2015

110,000 kms I’ve had my 2015 3.5 ecoboost F150 to 2 different automotive shops and no one can figure it out spent well over 2500 dollars on replacing parts .

Oxygen sensors intake including map sensor cleaning the back of the intake valves crc cleaner injectors high pressure fuel pump ignition coils and 2 sets of spark plugs and so far nothing !!! Changed

I own a transmission repair shop in Vancouver bc and I’m not very tech Savvy.

We only use our snap on souls pro scanner
And it seems like no one wants to take the time to really look into this misfire that’s on cylinder 4

Only happens at idle I’m sick of paying people that can’t figure this thing out .

My question to every one on here is is there any one that is very tech savvy that has a Pico scope and some really Good diagnosing Equipment around
Vancouver bc ?

Maybe try a leak down test? If a misfire is at idle and goes away at higher rpm it’s mechanical. Can you do a relative injector flow test with the scanner?? See if there flowing all the same? Do you even have spark from the coil??

Thanks for the reply I’ve moved injectors around wasn’t a fun job but I did it and the misfire did not folllow always cylinder 4 and it always when you drive for 15-20 mins and then I really need some one to diagnose it properly every time I take into some where they tell me it’s not misfiring but clearly can feel it and see it on my souls pro scanner but what I need is some one to use this picoscope and be patient till it does miss

Like Cheryl suggested, a cylinder leak down test would be a good next step to identify a valve sealing issue.

The one thing that comes to mind is valve springs. If one cracks it will cause valve bounce and a missfire. Otherwise a cam lobe. A visual inspection of the cyl 4 valvetrain will tell.

Ecoboost engines are direct injection. misfires at idle are common due to carbon build up on valves.

The original guy said they cleaned the intake valves with tons of parts thrown at it

What’s mode 6 say??

Gorgis wrote: 110,000 kms I’ve had my 2015 3.5 ecoboost F150 to 2 different automotive shops and no one can figure it out spent well over 2500 dollars on replacing parts .

Oxygen sensors intake including map sensor cleaning the back of the intake valves crc cleaner injectors high pressure fuel pump ignition coils and 2 sets of spark plugs and so far nothing !!! Changed

I own a transmission repair shop in Vancouver bc and I’m not very tech Savvy.

We only use our snap on souls pro scanner
And it seems like no one wants to take the time to really look into this misfire that’s on cylinder 4

Only happens at idle I’m sick of paying people that can’t figure this thing out .

My question to every one on here is is there any one that is very tech savvy that has a Pico scope and some really Good diagnosing Equipment around
Vancouver bc ?

@Gorgis, I'd stop throwing the parts cannon at it. Find a shop that knows what their doing or better yet a mobile tech as he'll want reviews because after all he works for himself so his reputation is on the line whereas a shop may just be shotgunning parts at it which seems to be the case.

I don't know the border situation in regards to being allowed across back & forth in regards to coronavirus but I'd check with Bernie Thompson @ ATS, Automotive Test Solutions in Albuquerque N.M. @ 800-571-6112 & see if they have any mobile techs they deal with.

You need a guy with the right equipment that knows how to use it. Once you find that person they'll get down to business.

I'm trying to add a YouTube link for a video for you to reference. Not saying itsyour solution but more so to show the many solutions that are available and how taking a proper path can get you down that road

Not condoning or saying to do it but I don't know how the exchange rate works up there where if you can go to the U.S. to visit and if you happen to purchase a scope with some sensors for Pressure testing if you get hit hard on the G.S.T. or whatever they call it these days or can you buy it, claim on taxes if they allow that up there or will the tax people see that and whack you. OR you could buy it and not worry about the write off and use it to make money and get your write off back many times over.

I say this as you mentioned being a body shop. With newer cars these days, CAN Networks, Accidents, etc it could be a process you keep in house if you find a tech trained properly or take it on yourself. With a scope the possibilities are endless.


I have the ATS 4 channel e-scope elite with the E-Scan Elite and the IEA, Intelligent Engine Analyzer. Its a great tool, based off the windows platform whether you add the windows surface tablet 7 option or not.

If you get the combo from AES wave it's around mid 8k range I do know if your a paid member and buy the combo thru ATTS out of Mahopac NY thru G Truglia he can get you an 11% discount. Yeah it saves you money but for a wireless scan tool (Bluetooth) with lifetime software updates, Scope, 4 or 8 channel, your choice, the IEA, training videos included and many case study videos on hud YouTube page you can be up and running if you already have a working knowledge.

In the scope there's not much setup needed initially as it captures the data raw then you can manipulate it.

With all you say that's been done I'd be having some of those shops eat the costs on a improper diagnosis. I guess I'm honest and go by the theory that if I can't properly diagnose it I won't charge for my time beyond one hour and if I want beyond that one house I better have significant documentation to backup why I need more time aka.. YOUR MONEY! Consumers get ripped off all to often by shops with incompetence.

I also believe if I don't know something I have resources, other experts in the field that I'm going to reach out to and that's not just picking up a phone and calling the next shop but rather someone that I know who knows what they're doing.

I've seen horror stories where people have replaced transmissions, engines for things that shouldn't have been more than a few hundred bucks plus labor time.

People need to leave reviews on these shops Google Page Reviews, Facebook Reviews, Yelp Reviews. Make thee owners come to the table and explain why they think it's fine to take people's money without proper diagnosis. There's also the Better Business Bureau in the USA. Don't know what they have up north in Canada but I'd assume something of the same or maybe better.

Keep trying to link the YouTube video without luck. Will try under attachments otherwise watch for a extra post on this

If you're a body guy then you can figure this stuff out. Will you make mistakes? Sure we all make mistakes but educating ourselves with the knowledge (information) beforehand will make it better that our odds will be more in our favor.

Well figured out how to paste a link as seem to not be able to do it from Google, chrome Browser on Android with Samsung Galaxy Note 20 Ultra 5G.

I went and busted out the Tapatalk app and quickly found that it allowed me to paste the link.

Not saying this is your issue but it's definitely some food for thought @Goris .

Like I previously mentioned find a good experienced mobile guy who's good with a scope & he'll deliver results in less than a hour if not much R&D is needed.



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Hi everyone thank you for all the reply I just wanted to go over this again

This is a have 2015 ecoboost 110,000kms

It has a rough idle I bought it 3 months ago and it’s driving me nuts it has data misfires on cylinder 4 the most and the others have a few too but only on Data no codes

ive done a lot of things on it injectors , ignition coils , spark plugs , intake with new maps sensors and gaskets cleaned the back of intake valves with walnut blasting and used crc cleaning for the back of the intake valves and as well oxygen sensors .

so far nothing still idles and stumbles while it’s idling I’ve sat in some that are not close to this but mine seems to have a stumble every few seconds

I’ll attach some data picture here .

Thank you so much for everyone for helping

Can you do relative compression test and injector flow test since you have ford ids?

Do you have access to a scope yourself? Even one of the cheaper Hantek Scopes I believe it is that are available on Amazon? I think I've seen people say they're good enough for automotive. IF so maybe give it a try with a scope of that type since it'll cost way less than the parts you've put in it.

I'd highly recommend finding someone with a scope. This will get you good data. Being across the line from Washington I'd think you could find someone to meet up with if they can't come up there but I'm sure there's people in your area that would know how to do a scope. Even check ebay for a scope if you're into learning this.

Here's a link to a Hantek alot of people talk about.
www.amazon.com/Automotive-Diagnostic-Osc...6f-a83d-f486577edf4d

Lookup Michael Nicholson on facebook as he lives Northwest U.S. but can't recall if Washington or Further East. He's into pulse diagnostics.

Stop throwing parts at it. Cars can nickle and dime you if not properly diagnosed.




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Like Cheryl said, perform the relative compression and injector flow test on the scan tool. That'll narrow down your list of suspects very quickly.

Who changed the spark plugs? What brand was installed?

So here are a couple of images of scanner connected to the ignition coil number four and they all seem to do the same where it keeps dropping is this normal?? I’ll included a video

Here is the video

Sorry guys I can’t seem to upload a video so what I did was I took a few screenshots and this is happening every few seconds is this normal

.