Nissan S15 sputters / hesitates during full throttle

[HotSauce]

Make a short story of this.
Ran the car home to give it a wash. 1.5h later and good to go I noticed it started to sputter / hesitate during full throttle
Now I been tried to fix this issue by change;
Brand new plugs, bkr7e re-gapped to 0.7
New fuel pump (from nissan r34 gtr)
Coil pack
All vacum lines
Blocked BOV (if that made difference)
Added a ground kit

None of these helped at all.
If turning off the boost controller to run stock boost at 0.7bar it runs fine, but turning up boost it start doing this funky sh*t again. Car have been tuned with apexi PFC incl the EBC set to 1bar / 14.x psi.

By looking at the new plugs, 2of em are very white. So now im gonna go for a new fuel filter and try another set of injectors and MAF.

Did any of you had similiar problem?
Please help, running out of ideas :annoyed:

Video;

 

[Jaydej]

Sounds like your losing ignition when it comes on boost

 

[HotSauce]

Any tip on what to check next?
Any help appreciated!

 

[tooley]

Coil pack mate!

or plugs one or the other! mine was dodgy no.1 pack.

 

[HotSauce]

Plugs are brand new, gapped to .028 / 0.7
I hope its not the coils. They are only like 10.000km old (Yellowjacket)
What about the the plugs are white at the tip? My old ones arent :|

 

[sibbers]

Coil pack mate!

or plugs one or the other! mine was dodgy no.1 pack.

Another vote for coilpack

Great vid btw, should help others that search out the problem. Usually happens worse when cold and car under greater load.

 

[S15_SAM]

White at the tips usually means lean/no fuel. Got any pictures of the plugs? Injector issue? Over boosting?

 

[S15_SAM]

Also I run bcpr7es gapped to 0.7 although I've read bk's do fit but aren't as tall.

 

[HotSauce]

Thanks for all the tips.
Turned out to be the coil-pack.

Looking for another set of coil pack. Do you guys have any tip here?
Wont be using YJ coils again. But what about splitfire?

Thanks again!

 

[Mycool]

i had this problem, couldnt get round to what it was, it ended up being the coilpack harness!