Slight misfire under partial throttle.

[Rich1968]

Has anyone experienced a slight misfire under partial throttle at around 30-40 mph? I had the Ford dealer look at my truck and of course they can't find anything wrong and no codes. 2019 Ranger Lariat. 2.3 ecoboost. Thanks.

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[My12SecRanger]

if you have a decent scanner, you can watch misfire data live and see which cylinder is having the issue, I had something similar on my truck and turned out to be a bad coil pack with no codes

 

[RedlandRanger]

That sounds suspiciously like a failing DPFE sensor unit:

https://www.ranger5g.com/forum/thre...mbly-replacement-write-up-lb5z-9j433-b.29247/

 

[Rich1968]

Thank you everyone for your replies

 

[Rich1968]

Can you order this on Amazon or is it a dealer part? The Ford dealership couldn't find anything wrong of course.

 

[TJC]

You can get it from Rock Auto for under $20

 

[Frenchy]

Might be normal operation of the 2.3 EcoBoost. Remember that it is a 4 cylinder. While in drive touch the plus or minus on the shifter and you can see what gear it's in. If you have to manually lockout a gear so it makes it easier

 

[Rp930]

I had the same. Very slight. New spark plugs cured it. The part number changed since 2019. I had about 25k miles

 

[Rich1968]

Thank you for your reply. I appreciate it.

 

[Rich1968]

That sounds suspiciously like a failing DPFE sensor unit:

https://www.ranger5g.com/forum/thre...mbly-replacement-write-up-lb5z-9j433-b.29247/

I replaced that sensor and it runs great now. That did it. Thank you.

 

[Msfitoy]

Well that was easy...?

 

[Charlie's Ranger]

I had the same. Very slight. New spark plugs cured it. The part number changed since 2019. I had about 25k miles

I just cured mine with new spark plugs too. No water in the wells. 2020 with 45k misfiring on low RPM loads not bad enough to trigger a code but enough to easily notice the shake. The old plugs look good. I have used the cheap gas since I bought it new. I do still notice a slight bounce when it shifts so i am going to put the DPFE in to see if that improves shifts.

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