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-   -   6.4 Missfire when warm (https://www.dieselbombers.com/ford-powerstroke-08-10-6-4l/120475-6-4-missfire-when-warm.html)

Spec-Auto 04-15-2014 10:50 AM
6.4 Missfire when warm
 
I have a 2008 F-350, 6.4L
has cold air intake, H&S Mini Max tuner, full exhaust
When you first start the truck it runs like a top and sounds great.
After a couple minutes of idling it starts to misfire really bad on cylinder 8 and throws code P0308.
thought it might be injector so replaced it, but still does it.

Any Ideas on what it could be, This truck is really starting to frustrate me, any help would be greatly appreciated.:argh:

---AutoMerged DoublePost---

also has EGR delete

gunman41mag 04-15-2014 12:17 PM
code P0308 Cylinder 8 Misfire Detected:humm:

Spec-Auto 04-15-2014 12:56 PM
ya, has cylinder 8 misfire as well as cylinder contribution.
let it sit over night just to watch what it does and when it starts to act up, seems to start with a slight misfire around 70 degrees then as it warms up it gets worse and worse, when it hits 120 that's when it turns into a hard miss and smokes like crazy:argh::argh::argh:

Jasond88 03-17-2024 11:45 PM
Same issue help!!
 
Originally Posted by Spec-Auto (Post 1057857)
I have a 2008 F-350, 6.4L
has cold air intake, H&S Mini Max tuner, full exhaust
When you first start the truck it runs like a top and sounds great.
After a couple minutes of idling it starts to misfire really bad on cylinder 8 and throws code P0308.
thought it might be injector so replaced it, but still does it.

Any Ideas on what it could be, This truck is really starting to frustrate me, any help would be greatly appreciated.:argh:

---AutoMerged DoublePost---

also has EGR delete
I have the same issue with mine, did you ever figure this out!?


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