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 > V10 misfire codes

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way2roll

Wilmington NC

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Joined: 10/05/2018

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Posted: 09/27/21 10:37am Link  |  Quote  |  Print  |  Notify Moderator

Similar issues on my previous F150 with a 5.4. I ended up getting an ODBII reader with the torque app. It shows real time data. Misfire rates for the ford engines have thresholds that may/may not throw a code. But the torque app allows you to see that actual misfire rates and pinpoint the exact cylinder. Usually it's a coil pack. I actually started carrying extra in the truck and could swap it out in 5 minutes. One trick I did that seemed to stop the problem was a liberal amount of dialectic grease on on it before installing. The plug wells are deep on those engines and hold moisture which I think contributes to the fouling. After I started to do that, I never had the issue again.

* This post was edited 09/27/21 10:45am by way2roll *


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dodge guy

Bartlett IL

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Posted: 09/27/21 10:39am Link  |  Quote  |  Print  |  Notify Moderator

Since it’s all on the one side I would check for a vacuum leak. The plugs and coils for that year was good for preventive maint so that wasn’t a waste of $$$$. It needs to be diagnosed could be as simple as a bad O2 sensor.


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enblethen

Moses Lake, WA

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Posted: 09/27/21 02:42pm Link  |  Quote  |  Print  |  Notify Moderator

Cylinder two and six are on opposide of the engine.
This shows where cylinders are located. My thinking it would not be an intake vacuum leak.
V-10 engine layout


Bud
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