Persistent high rpm cylinder 5 misfires/shutdown (fuelmode 15)

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[NoGuru]

Looks like you have done just about everything I would think of. Does Wedge have any recommendations?

 

[NoGuru]

How old is your battery?

 

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[derekgates]

Oof, I get consistent misfires when I redline it as well. Wedge told me to go with BL coils. It worries me that you STILL have misfires with the coils.

Sorry I don't have much to add other than a "me too". I avoid redline now, but accidentally hit it on the straight of NOLA Motorsports on Saturday... had to limp all the way around the track to pit.

 

[Jeffman]

Double check your electrical connectors on your ignition system. I had a bent prong on my #4 PR coil connector causing misfires that took weeks to find.

 

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[JohnDaviz]

Ask Wedge to turn misfire detection above 6300 rpm off. Test with your Buttmeter. You will feel a misifre and for the sake of testing it is not really a harmful thing.
You did everything to solve possible real misfires. But you simply may have phantom misfire.

 

[Slowagon54]

Cyl 5 is always a pain in the ass. Did you replaced the o-ring seals on the intake manifold after Walnut blasting?

 

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[JohnDaviz]

Turning Misfire Detection off is a 10 second effort.

But okay. If you are stuck on Fuel Mode 15 you have something going on.

 

[carabuser]

Fuel mode 6 indicates a problem too, that's component protection mode. Fuel mode 15 is emergency run so probably a result of the issue rather than the cause.

In that first log your HPFP is all over the place. I'd start with getting to the bottom of that issue first.

 

[Jern54]

Bouncing HPFP pressure is a result of the Helix. My car suffers from it as well unfortunately.
Don't like it at all.

 

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[Slowagon54]

Hell

 

[JohnDaviz]

Sorry to see.. But what am i looking at? Is this the cylinder wall?

 

[derekgates]

Yeah what is that? Crank? Bearings? Cylinder wall itself?

What are your next steps @b4llistic ?

 

[Slowagon54]

Cylinder wall. Maybe you have a cracked piston? Hope you can fix it.

 

[b4llistic]

EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.

 

[Tonyyycadena]

Yeah its a scored cylinder wall. I don't know when it happened/started happening. Cold compression is still the same so it might have happed a long time ago before. Perhaps even before I got the car. It's only noticable at 20psi+ high rpm.

Currently putting options on paper but i'm leaning towards partout.

have you found what’s causing the fuel mode? i’ve been researching and apparently it’s a lost connection between the O2 sensors and the DME once the car hits high RPM.