CHECK ENGINE LIGHT codes p0308 and p061a

[dkash]

Hi! I have a 2017 gt pp1 full bolt on and tuned. I was recently driving through some snow and got stuck and had to floor it to get out. the next morning i noticed a check engine light and received the code p0308 so i assumed the rough shaking of the back end caused an air bubble in the fuel line which caused a misfire in cylinder 8. I cleared it. Today i got another code along with the first one coming back. P061a. no noticeable loss of power and the car is driving fine. What do I do??

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[ORRadtech]

I have never heard that one before, an air bubble from shaking causing a single misfire... I mean it's so extremely unlikely as to not even be a consideration.
The first thing to do for a single cylinder misfire is to swap the coil pack with a different cylinder and see if the misfire moves.
If it stays on #8 then you have more checking to do.
I have read that a persistent #8 misfire can be an indication of VVT issues.

 

[coyote550]

I've seen a bunch of people posting on there about the p0308 being cause by the variable runner flaps on the intake manifold that stop actuating. Only way to really know is to pull the manifold off or use Forscan. The other code is likely just a a result of the random misfire.

 

[mt82#1fan]

Likely loose vacuum hose or intake elbow. Check intake from filter to manifold and tighten everything then clear and see if it recurs.

 

[ORRadtech]

Well the OP posted this in January so hopefully he figured it out. It would be nice to know what his outcome was.

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