Bucking/Jolting- in all gears and very noticeable in all gears HELP!

[Washingtonwarrior]

I’ve researched all over online , went to the dealer twice and I will be taking it back after the new year , but if anyone can lead me into some fixes that would be great ..

80k miles ,bucking and violent jolting but very noticeable under load or going up hill. But I only feel it AFTER 10-15 min after the engine is on, when I drive it after a cold start 10 min after warming up it feels somewhat normal to drive. But once it’s warmed up it does start to do this bucking .

took to the dealer and they said it was a EGR valve (seems like a lot of guys had this problem). I told them I would fix this myself , took me 30 min to do .

Problem still exists . I took it back to the dealer and they said I needed to do a KAM reset, the tech did it for me on the spot and then came with me on the test drive and he was like “whoa this is what you have felt?” He then hooked up his laptop for tranny slips or rough shifts and there was no problem .

he then did a ignition misfire test and while driving it it showed cylinder 4 and sometimes 2 were spiking or misfireing.

he said it seems like a ignition/spark plug failure . And told me to replace my spark plugs and coil pack and then if it still has a problem to bring in.

I just replaced my spark plugs yesterday and the problem still exists , the coils get here in 3 days I’ll put those in, but what else would this be?!?!

No Check engine light through any of this btw.

im gonna go look into forscan today and see if anything is there … but i doubt it

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[Stevedbvik1]

Did you replace the EGR valve or the sensor?

 

[Washingtonwarrior]

Did you replace the EGR valve or the sensor?

Yes replaced both

 

[Washingtonwarrior]

Did you replace the EGR valve or the sensor?

Actually sorry I replaced the egr sensor but not the actual egr valve body

 

[Rp930]

Probably a coil.

 

[Jason B]

Or DPFE.

Were there signs of water in the plug wells?

 

[got3fords]

Wouldn't bad plugs or coils throw a misfire code?

 

[Washingtonwarrior]

Or DPFE.

Were there signs of water in the plug wells?

The dpfe is the the egr and yes I replaced the dpfe egr sensor

 

[Washingtonwarrior]

Wouldn't bad plugs or coils throw a misfire code?

You would think ya but apparently they don’t always throw a code , I’ll find out Saturday if the new coils fix it but ya I would assume a check engine light would come on

 

[Metalshift]

I would disconnect the lower air to air (intercooler) pipe and check for moisture. If any amount is found I would dry and probably clean the dpfe and related paths/plumbing. Sounds like it could be a fogging/misting issue disrupting correct sensor data.

I would also want to be absolutely sure of clean, water free fuel with the correct ethanol content.

 

[got3fords]

I would disconnect the lower air to air (intercooler) pipe and check for moisture. If any amount is found I would dry and probably clean the dpfe and related paths/plumbing. Sounds like it could be a fogging/misting issue disrupting correct sensor data.

But wouldn't that also throw a code?

 

[airline tech]

If the coil does not fix the issue (Only #4) as the firing order is 1-3-4-2. No 2 is picking up resonance misfires from #4 as its the next cylinder to fire.
Number 4 Cylinder is the problem cylinder if the coil is (no help) then it needs to have a Relative Compression Test, Power Balance Test and Injector Flow Test done to pinpoint down if it is a compression, vacuum leak or injector flow issue.
So bad injector #4, head gasket or intake gasket leak around #4 port (expands when engine is hot) and leaking.
With the check eng light not triggering I am leaning towards a gasket leaking as a high probability.

 

[Washingtonwarrior]

If the coil does not fix the issue (Only #4) as the firing order is 1-3-4-2. No 2 is picking up resonance misfires from #4 as its the next cylinder to fire.
Number 4 Cylinder is the problem cylinder if the coil is (no help) then it needs to have a Relative Compression Test, Power Balance Test and Injector Flow Test done to pinpoint down if it is a compression, vacuum leak or injector flow issue.
So bad injector #4, head gasket or intake gasket leak around #4 port (expands when engine is hot) and leaking.
With the check eng light not triggering I am leaning towards a gasket leaking as a high probability.

Thanks I’ll post an update as soon as I get the coils in. I’m curious what ford is gonna say. I will be honest , the ford tech is really honest and has been helpful . That said I am going to go in expecting them to give me some sound reimbursement or refund . How can they say it’s a egr valve sensor. Says problem confirmed . Then I fix the part and the problem still exists. .. I’m getting closer to the answer now that all 3 parts will be replaced .
1. egr sensor
2. Spark plugs
3. Coil packs

 

[Washingtonwarrior]

So be I changed all four coils , problem still exists . Runs fine 15 min into drive and no issues but then right when the engine is warm it starts getting active . I’m gonna take it In to the dealer tomorrow and see what happens.
Things I’ve replaced so far
Egr sensor
Spark plugs
Coils

still no cel , and I checked for anything in forscan after drive and cleared the system just in case .

Bummy

I added a video of it works you can hear what it sounds like

 

[RangerBill]

So be I changed all four coils , problem still exists . Runs fine 15 min into drive and no issues but then right when the engine is warm it starts getting active . I’m gonna take it In to the dealer tomorrow and see what happens.
Things I’ve replaced so far
Egr sensor
Spark plugs
Coils

still no cel , and I checked for anything in forscan after drive and cleared the system just in case .

Bummy

I added a video of it works you can hear what it sounds like

Are you sure that you got the #4 coil seated onto the spark plug properly? That one is especially hard to get snapped onto the spark plug due to having to put it on at an angle due to other devices being in the way.

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